There is a trick you can try:
rename the folder name of your project.
create new project > existing directory > choose the folder you just renamed, click create project.
I just experimented in my computer. It works.
You need to shutdown RStudio totally, then restart it
There is a trick you can try: rename the folder name of your project. create new project > existing directory > choose the folder you just renamed, click create project. I just experimented in my computer. It works. You need to shutdown RStudio totally, then restart it