Nothing special is required. If you default oxwall cron is running, it would be fine.

Thank you.. some questions please..

1) If i purchase it and enable it, everyone will have friend everybody.. right?

So everyone will see in Chat the others, right??? This is the point.. Am I correct until now?

2) If I add subscription later on, would it be possible to NOT allow the "friends" message each other until they pay?

3) Is it be possible to saw ONLY the ONLINE friends???? 

4) If i want to reverse everything as now (only adminpal) is it easy to be done? I only need to disable the plugin of FRIENDSHIP FOR ALL?

Thank you so much!

1) you are correct.
2) Its not in control of this plugin.
3) Its not in control of this plugin.
4) Will need some database deletions. But ideal way would be to do programmatically.

Thank you so much Purusothaman!! 

Regarding 4 what you mean?? Is there a program for this? (to revert everything)

Thank you!

No Sir. We need to find some logic for that.