moving movments

Well, you can't do it "efficiently", but you can get it done.

Easier to move movement 2 to the end than the other way so that's what I'll describe, but it's possible the other way too.

To the end of your current file, add enough measures to contain the entire second movement. At the beginning of these new measures, add the time signature that movement 2 starts with. In movement two, select measures from the beginning to the first change of time signature. Copy that into the blank measures at the end. Repeat both steps (new time signature, then notes in that time signature) until you have copied all measures and time signatures.

I specified "copy" rather than "cut". This was deliberate. Once you've completed copying/pasting what you can, then go back through the (current) second movement and compare it to the moved second movement. There will be other items than time signatures that were not copied and pasted: add them manually to the moved second movement.

Once the two copies of the second are identical, then delete the original second and the measures that held it.

Another possibility: simply save each movement into a separate file. Then the only changes you'll have to make are specifics like change the text title of "movement 2" to "movement 3" and vice verse. Add them back together with a PDF editor or similar.