Sounds like all the sash clips broke, and it fell off the regulator. If you pull your door panel off, you should be able to work the glass back up. You can pick up some clips at an auto parts store, and glue them back onto the glass.

I'm not 100% sure, but you can probably use some general purpose adhesive like JB Weld, or similar.

Ln 201 or Ln 202 is gonna be a good adhesive to use for something like that ...

they are liquid nails brand and are called

ceramic projects repair adhesive and home projects repair adhesive.

Good luck

The end of that cable you see lying on the bottom of the door has a small keeper crimped on the end. This keeper seats into a nylon holder that is attached to the clamp that holds the window in place. Quite often that keeper will break through the plastic piece and the result is what you have on your car. The approach you are using (replace the regulator) is the correct fix.

Manually raise or lower the glass until you can access the two bolts that hold the glass clamp. They are probably 10 mm bolt heads. Once the clamp is loose and the glass is free of the clamp, manually raise the glass to the full up position (gets it out of the way) and put a stick or something in the door to hold the glass up there. Remove the electrical connection to the motor. Remove the nuts (3?) that hold the regulator to the door, and work the regulator out of the door. If the new regulator has a motor, reverse the process to install. If not, remove the motor from your old regulator and put it on the new one.

There are no clips glued or attached to the glass. It is secured to the regulator by squeezing it between two pieces of metal using the two 10 mm bolts. There is probably some rubber in there that prevents metal to glass contact.

Once it is all together and working properly, there is one last very important step. When you pulled the door trim panel off, there was a sheet of plastic stuck to the door with some of the nastiest sticky black stuff (its called butyl) you will ever work with. If you don't put that plastic piece back on properly you will get water leaks through the door into the car. Depending on how you removed that plastic piece, you may be able to salvage the butyl, but I always replace the butyl when I pull the plastic water shield. You can buy this stuff in rolls that come in 3/8" and 1/2" beads from any auto body supply shop. Its the same stuff that is used to install windshields in older cars. Buy the smallest diameter bead they have. When you put this stuff on the door sheet metal, pay particular attention to follow the exact same path as the old butyl. This will ensure water flow in the door is managed properly, and exits to the outside rather than into the car.

This is a fairly simple repair that most people with mechanical abilities and a very basic set of tools can do. The hardest part is getting the old regulator out of the door and the new one in. Just be patient and work it around until you can get it out of the door.