find in your theme folder master_pages

add too all files in section "ow_footer"

this

{$bottomPoweredByLink}

All of them already contain this in the bottom of the files:

<div class="ow_footer">

        <div class="ow_canvas">

                <div class="ow_page clearfix">

                        {$bottom_menu}

                        <div class="ow_copyright">

                                {text key='base+copyright'}

                        </div>

                        <div style="float:right;padding-bottom: 30px;">

                                {$bottomPoweredByLink}

                        </div>

                </div>

        </div>

</div>

{decorator name='floatbox'}

With the code, and css being there.There may be some other element, or css pushing it out of view. You can try using inspect element to try to see if that is the case.

check if css code dont have display:none attribute or javascript code dont hide image. What say Darryl: You can try using inspect element to try to see if that is the case.

Thank you very much for your answers.Im not sure which css code you refer to, and im not 100% confident how to find the right info through the inspect function in the browser. Even though Im in the process of trying to learn it all. Is there a certain file I can check instead?

The first image:

yoursite.com/ow_static/themes/your-theme/images/powered-by-oxwall.pngis working perfectly in my browser, how ever the next one is not:
yoursite.com/ow_themes/your-theme/images/powered-by-oxwall.png

which is showing a message telling me i have no persmission to access the file, which I guess is normal as its the same with other files in that same directory?

The file is in its location how ever.

give us site url

The url is as follow:
removed..

Interesting. The div is there, but the <a> tag, and the <img> tag that should appear beneath the <div> aren't showing.
The code you listed above should be in both the general html, and dndindex.html files.  In addition the blank.html file should have the code for the attribution only without the copyright, or footer menu.

<div class="ow_footer">
    <div class="ow_canvas">
        <div class="ow_page clearfix">
            <div style="float:right;padding-bottom: 30px;">
                {$bottomPoweredByLink}
            </div>
        </div>
    </div>
</div>

If the code is in all three files. The next question would be is if you see the same issue in other themes. If it is all themes then the issue could be somewhere in the core files.

The problem is in other themes as well yes..

The developer whom made this happen was working with implementing a skadate plugin to our site.
Could it be that the skadate plugin is making the oxwall button invisible?

so developer must edit core oxwall files where smarty variable bottomPoweredByLink is assing in php code

maybe he change this to $this->assign('bottomPoweredByLink', ''); and you don't have image

I have gone over the files that has been modified and I realise that he has modified the base.css file in the theme, location /ow_themes/professional/base.css.

Im not fully sure of all the changes in the file, but he has at least added some code after the last line number 5612, which makes the new file containing 5687 lines.

The new lines are located beneath the /* --- End Splash screen --- */ and look like this:

/* ---- Ulist big Styles ---- */

.ow_ulist_big {    padding-top: 12px;}
.ow_ulist_big_item {    float: left;    width: 25%;}
.ow_ulist_big_item .ow_miniic_live {    top: 2px;    left: 2px;    position:absolute;}
.ow_ulist_big_item_cont {    height: 240px;    margin: 0 auto 20px;    overflow: hidden;    position: relative;    width: 180px;}
.ow_ulist_big_avatar {    background-position: 0 0;    background-repeat: no-repeat;    background-size: cover;    height: 180px;    position: relative;    width: 180px;}
.ow_ulist_big_avatar:hover {    box-shadow: 0 0 150px #000 inset;
}.ow_ulist_big_avatar_shadow {    display: block;    height: 180px;}  
a.ow_ulist_big_avatar_bookmark {    position: absolute;    bottom: 6px;    left: 8px;    display: none;    color: #fff;}
.ow_ulist_big_avatar:hover a.ow_ulist_big_avatar_bookmark {    display: block;}
.ow_ulist_big_info {    margin-top: 4px;    position: absolute;    margin-bottom: 8px;}.ow_ulist_big_info_name .ow_small {    position: relative;}.ow_ulist_big_info_name .ow_small:hover {    text-decoration: underline;
}
.ow_ulist_big_info_name  {    float: left;    max-width: 160px;    max-height: 1.5em;    overflow: hidden;}

/* ---- End of Ulist big Styles Styles ---- */

Could this be what make interference with the Powered by Button? 
Or could you give me some tip about which line to search for?

This doesn't appear to be anything related to the theme files since it happens on all themes. There is a file somewhere in the core that defines the $BottomPoweredByLink.  If you can find where that is, you may be able to solve your problem. 

Thank you very much for trying to help, but Im not very advanced in all of this and am having some problems what to search for in the files.

As for example I searched for ow_footer and got the following results in two different files outside the themes folder:
/ow_system_plugins/base/views/components/bottom_menu.html

where I found this:
<div class="ow_footer_menu">
And file:
ow_system_plugins/base/controllers/media_panel.php

where I found this:

OW::getDocument()->addStyleDeclaration(".ow_footer{display:none;}");

?? Im not really sure what to search for here, so just trying several search phrases using Notepad++ to search through all the codes in the files..
Should I try change display:none to something else, in case into what?

{$bottomPoweredByLink} is calling for the variable bottomPoweredByLink. This should be somewhere in the core files, and would also have code defining the link for the image, and the image location. I would guess that it is defined in one of the php files, but I have no idea which one. Since this happened after the developer made modifications; he most likely changed something in the file that defines this.
I wish I had a good answer for you. If it was something just css related, that may be easier, but this does appear to be something changed in the base files, or possibly something in db has been removed.

I see. Thank you. 

I read something about how it was allowed to remove this link by donating $50. It seem now that this could be an easier solution for us. How ever I have dual feelings about this as I do like the idea about promoting the oxwall system and their idea as an open source system. And after having read a lot about the process of removing the link, it seem like it is not a well liked option. Which I understand. It also was very difficult to find information about the $50 donation possibility. Which makes me ask if this is actually true?

Is it really allowed to donate $50 to get allowance for removing the Powered By Oxwall link or not? And is it just to make the donation or do we have to register our domain in some database?

If so, we are at least certain about doing this legally, as we are not able to find an other solution now at this time. It would be to the best if we did not have to prioritise this at this time.

I don't mind donating this money anyhow, so if we figure out how to get it back in at a later time we would definitely see that as an option and regards of being able to use the software. 

i can try help you if you want this link, read https://developers.oxwall.com/...m/topic/57668?page=1