[help needed] undo clear rating

Oh I got a work around to this. I quickly run to another computer I have Logos installed on and disconnect it from the internet. I then try to apply tags to each rating manually (5 times by filtering). I then let it sync and of course some rating is gone but I can reconstruct them from the newly created tags.

Are there a universal undo that can take a step back to whatever last action was? It feels so unprotected if such option does not exist. I see that there's an Undo in the Edit manual, but I don't want to try that because I don't want it to undo whatever it might be undoing (I guess if I'm typing in a certain document undo is to undo the addition of the last piece of text for example.)

Probably I should just open a dummy account and add free resources there just for worry-free testing that no matter how I mess around it isn't going to mess up my main stuffs.

And in general that's why I've a phobia in creating any kind of contents in Logos. It seems like it isn't versioned, unlike other cloud services e.g. Dropbox does. Using Logos in this aspect really feels like I'm not in control at all.