Есть способ вручную сделать это:
'''WORKAROUND''' Actually you can do it for a long time — but only manually. Just create a new project anywhere where you want to store your project data, then go to Settings|Directories and detach its dir and attach your project root folder.
Just remember to open this folder instead of actual one next time.
Текст из тикета по добавлению этой возможности
youtrack.jetbrains.com/issue/WI-343