Rated 5 out of 5 stars

It worked perfectly at the beginning, when I first created the filters and run them manually. It does not work as set (I have all the options checked, so it should save the attachment 10 minutes after being delivered). Or maybe I misunderstood what this plugin is about. I would give it 5* if it worked automatically. I am using subfolders, so maybe it does not work on them. Thank you.
****************EDIT***************
Apparently it is caused by IMAP, and POP3 probably does not have this issue. I downloaded Filter Button add-on and can now run filter manually very quickly. I give 5* to this add-on. I found this on github:
"Ultimately this is a Thunderbird bug. All Filter actions are executed by Thunderbird automatically. FiltaQuilla only adds new methods, but Thunderbird decides when these filters are supposed to run - if it decides it can run filters on emails where the body needs to be investigated, but it isn't fully downloaded at that stage, there is nothing the filter can do to recover from this.

I think the timing (especially for IMAP accounts) of filter execution on startup is buggy. If you check your filter log, it will show which filters are applied (that means their condition was met when the filter was run) - you could check the Javascript error console after startup whether you see any exceptions, then we would have something to work with..."

This review is for a previous version of the add-on (4.0b2). 

note quite sure here what you mean - Thunderbird can only run filters automatically from the inbox. If you think you have found a bug, please try the filtaquilla github.