I cut the window out by myself, it did help to have a second person simply give a little push to start it out of the channel..
I used the 90 deg angle blade with a cable and handle to cut the sealer...
To remove the sealer from the glass, I used laquer thinner and glass cleaner.
If you are not going to paint the car , better stay away from laquer thinner on the channel and use something like paint reducer..., after you clean as much as possible with a scraper and 3M cleaning wheel.