I have Lmms 1.2.2 and it used to be that I could do ctrl+click and drag to copy sections in song editor, but I can't do it anymore. What is happening? Why can't I ctrl+click and drag anymore?

I want to be able to have the time signature change mid-song without completely altering the track. whenever I try to add a time signature change mid-song it stretches out the measures and causes tons of overlap and its overall just a mess. I want to be able to make a song with multiple time signatu...