Another option is to uninstall and reinstall R and RStudio.
If you'd like, I'll help you pass on your issue to the open source folks, they'll want your error information:
- General description
- The output of
RStudio.Version()
- Error messages
- Log files (See here, -
assuming you can get to it)
- Crash Report (See here)
- Attempted steps taken to fix
- Have you successfully launched RStudio in the past?