On Linux, Ctrl+R is Cursor’s default shortcut for File > Open Recent, so it opens the list of recently opened folders and workspaces (that is the “Projects” list you are seeing). It is the same default as in VS Code.
Separately, the dialog in your screenshot (“The window terminated unexpectedly, reason: ‘clean-exit’, code: ‘0’”) is a known issue on Linux with 3.19.x that we are already tracking.
@Colin Thanks for the detailed answer. However, when I switch to the recent project using Ctrl + R, I still get the same error (clean-exit). I have to manually open the other project or open it from the terminal using cursor ..
I have enough memory and storage available, but Cursor is still crashing again and again.