google: <your os> repair icons
1 person found this helpful
I had this problem too. Try changing the default application for PSD Files in Windows settings to something like Illustrator. The icons should change the to Illustrator application icon. Then change the default application to Photoshop again. This should revert the icons to the file icons as needed instead of the application icons. This method worked for me.
Hope it helps
This is an ancient problem that I frankly thought was fixed by now. It is caused/triggered by uninstalling a previous version after the new version is installed. Unfortunately, the CC installer still does this by default.
What apparently happens is that the uninstall globally changes some registry settings, so that instead of pointing to the new version, they are left orphaned, pointing to a version no longer installed.
A full uninstall/reinstall of CC2018 should re-establish the correct registry settings.
For the future, there is an "advanced options" rolldown in the installer, and here you can uncheck "remove old versions". But few people notice that. If you do wish to remove the old versions, do that before running the installer.