Thanks for sharing the crash dump!
Just to elaborate, are you only seeing the crash when attempting to close RStudio?
From what I can see in the crash dump, the crash is occurring when RStudio attempts to unload the libclang.dll library, which RStudio uses to provide diagnostics for C++ files opened within the RStudio IDE.
You could try disabling C++ diagnostics by setting the R option, e.g. in your ~/.Rprofile:
options(rstudio.indexCpp = FALSE)
and then restarting RStudio (it may crash once more the first time). Does that make a difference in your case?