Question Problem with debugger

Hello!
Sorry for my English, it comes from a translator.
There was an unexpected problem in the program I am writing. Suddenly the debugger stopped working.
Of course, its options in the project are enabled. In other projects the debugger works, so this is not a problem with CodeTyphon.
I suspect the bug has crept into one of the project settings files, but I have no idea where to look for it.

Greetings
Krzysztof

It's a simple application, I didn't change much in the project settings.
Only, looking for a solution to my problem, in the tab "Complilation and Linking" I set "Optimization levels" to 0

I'm very sorry, I haven't used a forum like this so I don't know what to specify yet.

OS: Windows 10 Pro 64bit
CT: 7.5 64bit

Unfortunately, it did not help.
In another application, debugging works perfectly.
In this project also worked. I didn't change anything in project settings.
Simply debugging stopped working without any message. It ignores breakpoints. As if debugging was not enabled.
I think the problem is somewhere in the project settings file: *.ctpr or *.ctps. Is it possible to "reset" them somehow?