Yes.. Start with a new DL !
What is your OS?
1.2.0 is available in RC6 now
Your version is completely outdated, and unsupported
You will hardly recognize lmms, but you can start here:
https://www.youtube.com/watch?v=jNanGVEOK4c
And that version is replaced too!
So Go here and find the version for your OS:
https://lmms.io/download/#windows
Back up all your own stuff, before you reinstall