When you invalidate the cache, CLion removes the cache files for all project even run in the current version of the IDE. The files will be recreated the next time you open these projects.
Note the following before you proceed:
The caches will not be deleted until you restart CLion.
Opening and closing a project without invalidating the cache does not result in deleting any files.
Local History is not deleted when you invalidate the cache unless you explicitly enable this option in the Invalidate Caches dialog. However, mind that Local History has a retention period of 5 working days by default.
Clear the system cache
Callfrom the main menu.
In the Invalidate Caches dialog, you can select additional actions that the IDE will perform while removing the cache files:
Clear file system cache and Local History: remove the virtual file system cache together with the information stored in Local History.
This action might be helpful for troubleshooting purposes when the usual cache invalidation is not enough to solve the problem.
Clear VCS Log caches and indexes: remove the cache and indexes stored in the VCS log.
Click Invalidate and Restart.
If you click Just restart, cache files won't be deleted, and the selected optional actions won't be applied.
For details on where various user-specific files are stored, see Default IDE directories.