There are changes and quirks in every version. Updates are free within six-months of purchase, licensed or not.
Before updating, Save Project File AS routinely, giving it a unique # or name, so as not to overwrite prior saves. Using Save Project Files (no AS) will overwrite. Then you can restore a project to the state it was in when saved. Just double-click the VPJ file (which isn't playable).
Upcoming versions in the weeks ahead should make better use of the GPU, for faster performance. Give them a test drive. There's no mandate to update.