Thank you very much for your report. Librerator should not interfere with CR3 in any way, both R1 and R2. The problem you describe seem to point to the missing developer key, which, as far as I know, can't possibly be caused by Librerator. When you installed R2, did you by any chance try to install jailbreak/Kite again? Maybe some of that caused it?
Launchpad folder is not needed on K4NT, and can safely be removed, but it shouldn't make any difference even if it's there.
Anyway, I'm glad you were able to sort it all out. And again, thank you very much for your feedback.
P.S. Your English is just fine