There's a simple way, which works on mine (2011).

In the edit menu, use "Copy From...To..."

Enter the bar # where the lyrics you want to move begin (Copy From Bar #). Then enter the number of bars of lyrics you want to move (Num Bars to Copy). Then enter the new beginning bar # (Copy to Bar #).
Select only "Copy Lyrics" and make sure everything else is correct, for example, un-select "Copy 1st Chorus to whole song".

You should get a message saying thet lyrics already exist and do you want to erase them? - answer yes. After the lyrics are moved, you will have one extra bar of lyrics at the old beginning position bar. Easy to delete that one.

Make sure you have a backup copy first.