Question: photoshop 7 could not initialize photoshop because the scratch disks are full?
Answer: If Photoshop 2019, or earlier, cannot launch because the scratch disk is full, hold down the Cmd + Option keys (macOS) or Ctrl + Alt keys (Windows) during launch to set a new scratch disk. ... In the Preferences dialog, select or deselect the active check box to enable or disable a scratch disk.