'93 FWB rear window issues

So I'm replacing the plastic window rollers. Fixed one side but the rear passenger window, all four broken! Problem is the window motor seems shot; I can't lower the arms to fix the plastic tabs.
There is No clicking from either main door switch or locally. Was working not long ago, I may have kept depressing the button too much in order to try to roll uneven window at one point.

How difficult is it to replace the motor; should I be checking other sources? All fuses checked. All other windows work fine. Please advice if you have come across similar issue....