cannot save since newest update

[Anonymous]

Edit: There's a Thread for this Issue already, didn't find it earlier. Seams to be a problem with the German UI. English UI seems to work. 
https://forums.autodesk.com/t5/fusion-360-support/save-quot-ok-quot-button-does-nothing/td-p/9927733

Since I got a new update to my fusion 360 installation yesterday I get this odd behaviour that I cannot save existing documents anymore. When I open a file, change something and then try to save it, I get the usual save dialog where I can put some annotations, but when I click on "OK" nothing happens. The dialog does not disappear, it doesn't change at all and it doesn't save.

I can however use the save as option and I can save new documents. When I setup a new document and I save it once, I can't save it again though. So I'm currently stuck with using save as and constantly creating new seperate instances of my parts which is obviously not going to work for me. I need the version control and I need to just save the changes in the same document as I used to do just two days ago.

What I have tried so far:

- Restarting the computer

- Restarting Fusion

- Logging out and back into Fusion

I just renewed my licens for 3 years so it can't be a licensing problem either.

Please help and please help as quickly as possible! I need to finish a project, but I can't do it when I can't save.