No, no, no James don't stress out about this, it's no big deal. All this stuff works fine, it was extensively tested a month ago. You're not going to break anything by doing more "testing" on your own. The fact that when you deleted the song and started over tells you what you need to know. You've been trying so many different things you can't remember exactly what you did and that's ok. Happens to me all the time. It's hard to concentrate and think like a tester would. Do only one thing at a time, it doesn't seem to work right so you DO NOT try something else without tracking down exactly what you did wrong in the first place. Keep doing that and you get so confused you have no idea what happened.

Don't worry about it, you did the right thing. Just scrap the song project and start over and this time pay closer attention to what you did. If something weird happens, just go to Edit>Undo and kill it that way. If that doesn't work then go to File>Open and you'll get a box asking if you want to save the changes and say no. Then open another song and go to Open again and you'll see your last song you worked on on the top of the list at the bottom of that Open window. Open the song again and you're back to where you were before you did whatever you did to mess it up.

This process is very simple and it's how you figure out what stuff does. Keep going to Open, say No to saving changes and just reopen the song again and keep on truckin. This is if Undo doesn't work because some functions can't be undone that way.

Bob

Biab/RB latest build, Win 11 Pro, Ryzen 5 5600 G, 512 Gig SSD, 16 Gigs Ram, Steinberg UR22 MkII, Roland Sonic Cell, Kurzweil PC3, Hammond SK1, Korg PA3XPro, Garritan JABB, Hypercanvas, Sampletank 3, more.