There seems to be a strange bug in Rstudio preview 1.2.1244.
When attempting to open a file in Rstudio preview 1.2.1244 IDE in Windows 10, I get an error titles "Error while opening the file" with the text, "The system cannot find the file specified".
This occurs whether I open it from the file window, the file/open file menu, or even double clicking on the file in Windows Explorer (dragging doesn't do anything).
However, it only seems to happen in my user profile folder or its subfolders. When I open a file from a different location it works okay and if I copy a file from the profile folder to another folder it will open from the copy. Strangely, it will then also open the original file in the profile folder, but not other files that were not copied.