You could edit it out of your save, I think.
First off make a backup of the save.
Then:
[ul][li]Get near the generator[/li]
[li]Save the game (and exit)[/li]
[li]Find the save file. The current location should be enough, no need to look in in other map files (I think)[/li]
[li]Find mon_generator, copy its id and remove sections that contain it from the file.[/li]
[li]Remove the section that contains mon_generator and its stats from the file[/li][/ul]
If the modified file loads and doesn’t crash, get out of the area and then go back. If it doesn’t respawn the generator and doesn’t do anything stupid after saving and loading once again, it should work fine after that.