I just tried the Softaculous install v1.2.6 on my dev site.
The following folders were set to permissions 001:
ow_pluginfiles
ow_smarty
ow_static
ow_userfiles
Using ftp I could not access or change permissions on the those folders. I removed Oxwall via Softaculous and it left those folders in the directory. I could not delete them using ftp.
Using cpanel >file manager I was able to change permissions and delete those folders.
Just thought maybe the dev team would want to know.