On a 1980, 46, the windows come out fairly easily.
Begin by getting furnature and tables out of the way in the salon.
Remove ceiling access panels, if you have them,
This allowas you to remove the wooden valence along the top border of the window.
I think there is another piece between the window and the valance.
All of these peices are screwed into place and come out pretty fast.
The base, where the tracks are, does'nt need to be removed to get the windows out.
If it's not damaged, sealing the wood with something like West System on the wood in the track area is a good idea.
It's not a bad job.