Blinkthinks, who first noticed that Navifirm is now locked down, reports that there is a work-around, at least for current ROMs, for downloading from the server.
DO NOT CLEAR THAT NAVIFIRM CACHE!!!
If you guys still haven’t cleared your Navifirm+ cache, D-O-N-T. Make sure you save that cache using WINZIP, or WINRAR or any compression utility. Then upload it somewhere and post a reply in this thread. Apparently if you still have the cache INTACT, you can still download from Navifirm.
The cache folder can be found inside the Navifirm+ 1.7 folder.
Presumably this will not allow future ROMs to be downloaded, but may be useful for those who are suffering a bricked device.
Read more at Blinkthinks here.