I have the same problem. In my case the problem happened after I installed git on my Windows 10 machine. I've tried:
- Uninstalling and reinstalling Rstudio
- deleting all of the desktop settings and files in appdata
- installing old versions of Rstudio
The only solution that I have at the moment is to open Rstudio as Administrator, which is not ideal.
It feels like RStudio is trying to do something with an application that it sees in its path and is unable to and crashes. However, no problems are reported when running the Rstudio diagnostic utility.
I really don't want to blow my OS up and install Linux, or move to another IDE, but very soon I'm going to have to consider doing one of those, as I need a fully functioning setup on this machine.
Any suggestions for some env vars to reset, or something else to try?