问题
My RStudio (V 0.99.491) is inept to change the R Version.
I act in the ordinary way through Global Options --> R-Version. Afterwards it hangs and doesn't work or react any more. The initial version of R which works fine is R 3.1.0. I have never had such a problem before. Maybe someone has faced with a similar problem.
I tried to uninstall RStudio, and install it again, but this hasn't help to fix the issue.
回答1:
I have had the same problem. Using my user account RStudio hangs up trying to change the version. All other accounts work fine.
I have located the problem in the folder C:\Users\myaccount\AppData\Roaming\RStudio\ and renamed this folder. After this everything worked fine.
I assume the problem was the file "desktop.ini.lock", because in the new folder RStudio generated, this file is missing.
来源：https://stackoverflow.com/questions/35275672/cannot-change-the-version-of-r-in-rstudio