I don't say to substitute PS, that would be insanity becouse that's the tool you have the habit to use, and picking new habits isn't straightforward at all, but to try and practice a possible alternative to avoid being locked up in cases like yours. By having a backup tool, even if more hard to use or feeling more extraneous, you remove a possible point of failure in case anything happen that prevent it's functionality.Photoshop is quite good already for me though. :3