Adobe Rush won`t load project AND crashes during autosave when working on a project

I`m using the latest verion of Adobe Rush on a new PC with Windows 10.

Lately I had the problem, that Rush crashes when trying to save my files. While working on the project a window pops up stating, that Rush was not able to save the project for quite a while and that I should exit to save. When I click the Home Button Rush freezes (does not react).

Now, one of my project I worked on, won`t load anymore!!!!

I tryed opening it, unsynced and synced. I tryed opening it on another devide. I also installed an older Rush version. And I duplicated the project .... nothing worked.

I also tryed importing the project to Premier Pro, which doesn`t work, too (no error message, only no progress or changes on the screen with the list of the Rush projects)

I guess, that the basic problem of crashing when autosaving corruped the latest audio file I created in the project. BUT, since I can no longer open the project, I cannot delete that file and repair the coding error.

I use Rush for my job. Therefore this error does not only cost me me lot of time, but also a lot of money.

Please help me!!