Lost all Data inside of my Collections

Hi Everyone.
I did read about a few posts in the forum from people experiencing similar issues but I cannot pinpoint the reason in my case.

I have about 18 different collections, each with their own sets of Requests. I am not aware of any sync issue or Client Updates that caused this, but suddenly all of my entries are just empty.

I can see the Collections, and all the Requests kept their Title, but everything else is erased. No URL, no Header, no Body, basically just empty shells. When logging into the Web Version, I see the same.

I already went into AppData/Roaming to look at the backup files from the last two years, and they do not contain any data :frowning:

What happened and how can I get all my work back ?