Incorrect canonical for home page if wordpress in folder

I found a problem with the canonical URLS for the home page´s amp version, generated by this plugin in the case where the wordpress is installed in a folder. Opened a ticket, pointed out the error, and sent them the solution. 2 days later I got back a message “we fixed the issue”.

Their “fix” was totally unprofessional: they went ahead and edited the plugin on MY site. The fix of course lasted ONLY untill the next plugin update. Totally unprofessional.

So even if I consireded this a fairly okay plugin, and I saw potential in it, unfortunately I cannot give it more than 2 stars.