I also just discovered that downgrading back to v107 totally screwed me. I get a warning that downgrading "may" corrupt bookmarks, etc. and I am only given two choices: (1) create a new, empty, profile; or (2) quit. I do not get the option to try using the profile anyway, and yet I see nothing that indicates that any changes to the profile format has been made between v107 and v108, just that it "may" have changed.

So, I cannot get back to the state I was in before the idiotic change in v108 was unceremoniously foisted on the user community.