In the process, I wanted to expand the top window with the scene display, and as a result, the lower window just collapsed when you drag the top window so that it does not expand back at all, nowhere below catch the cursor to stretch it back. Tried to reinstall the program, it is installed with the same window settings that were before the removal! It's impossible to work! What to do?
UPD: I found a solution - deleted the configuration files that remained after uninstalling the program in the AppData folder. Rude of course, but it worked.