downgrade all does not work

"Press Shift + Attack to Downgrade All": true,
does not work for me. Authorizations are given. Could you check this?

Please send me the config. Do upgrade all and remove all work properly?

Yes, Upgrade all works. I haven't used Remove all yet. 

 I checked it again, Downgrade all works. I seem to have some kind of conflict. Your plugin is fine. As soon as I know in which context it is not working, I will contact you again. Thank you very much!

Good, Get in touch! 

There is no conflict with another plugin. I now know what the problem is. If 2 players build on the same building, then downgrade all no longer works because the components were set by 2 different people. 

Oh, I see. Thank you! I'll try to fix it soon!