I just upgraded to 3.0 should PSOC 2.2 be removed? If so what is best way?
I should have said Creator 3.0 from Creator 2.2
I left Creator 2.2 installed. It seems to coexist fine with 3. You can run 2.2 through the start menu.
I keep Creator 2.2 installed as Creator 3 removes support for a few devices. If you own an ES silicon dev board or psoc5 board you will probably want to keep a copy of creator 2.2
You can unistall creator 2.2 using the Cypress Update Manager
Keep both. As mention from other memebers, some devices were removed. Would be a headache if you need to support those devices. But if you use if just for learning or with new projects. Use the creator 3.
In the past the rule was that you can keep major revisions installed in parallel while a new minor revision will replace the previous one.