What happens if you say "no" when you're asked about removing an older version?

Hi - it says it cannot find a former version. I have run searches and cannot find anything.

Isn't that when you click "yes"? I'm really confused too.

I'm baffled too.
Noprobllama asked if you click "No". Does Clean Installer say that it cannot find a former version too? Because as Noprobllama said, that should happen when you click "Yes".
Have you tried deleting Clean Installer whole and downloading it again? In other words, reinstalling? It seems like it's stuck on the "Old version" error.
When exactly does it show the error? Have you tried just opening Clean Installer without trying to open the lot and it shows the error?

Yes, I have tried opening it and I have selected the option to let Clean Installer remove the old program. No luck.

Thank you!

Just to clarify, the thing you described happened when you clicked No or Yes? You said you used the option to let Clean Installer remove the "old" program. What we needed was to not let Clean Installer remove the "old" program, like clicking "No".