🌟 Cape Albacore World Collaboration - Completed!

I think my struggle with Custard is I don't know how to locate the file to check. I saw an old video that explained how to use it but the step I need was skipped over. I now know I can't check the file after it's installed, but how do I get it from the Exchange to Custard? Do I click "add to game" then go to the launcher? How do I get it out of the launcher to check? I'm old so this stuff confuses me.