I've still got a working Amiga system, with a few working floppy drives, and I've a copy of Final Copy 1, and 2, and Final Writer 4, 5 & 97 (last version for Amiga).
I can also clean floppy disks, to get them back to full working condition, if they have apparently ceased to work - as long as they don't have concentric circles, or other obvious damage on the disk surface, indicating physical damage to the actual surface of the disk media which you should be able to see if you slide the disk access metal cover.
Even then usually some or most of the data on them can be recovered, by one means or another.
If you have ANY doubt that the disk may not work, then DON'T try to read the disk in a disk drive as that may actually damage the disk, as the disk reading head will drag across the disk surface from the build up of debris or mould/dust that collects over the years.
Wheras cleaning it will most probably resurrect the floppy disk data - not guaranteed, but 99% of the time it does, even on game disks with hybrid boot sectors.
I'm in the UK, but if you want instructions on how to 'clean a floppy disk' then try reading Amiga Future Issue 87, 88 & 89, where there are 3 good tutorials on how to clean a floppy disk.
You can send me the disk if you like, and I'll take look at it for you, if you can't get sorted out by anyone else that is.