You should be good to go, the changes were made on your GPS. Also, no need to download JaVaWa Device Manager on each computer. Just install it to the uSD card on your GPSr and use it with any host PC. Likewise with BaseCamp. Just copy your BaseCamp program directory to your uSD card, and run from there on any host machine! I store many additional maps, waypoint files, tracks, routes, GPX files, etc. in a hidden directory on my Montana uSD card, and am able to manage the unit quite nicely running BaseCamp and JaVaWa Device Manager directly from the unit itself on any host machine with a compatible operating system. Cheers!