@franco
The only version missing from post #1 is V5.30 and that's because Garmin withdrew it as faulty and reissued v4.90 before doing some big bug fixes with 5.40. I added a warning only some 7 hours before your post above about using 5.30 for that reason. So if it's 5.30 you're looking for, forget it. I doubt we will ever see any more versions of this fw unless something seriously wrong is found in 5.40 and that's unlikely now. All other versions are available but unfortunately as i said earlier in post #12 your problem with that nuvi750 is not fw related.