Hello guys,
wanted to share my resolution with you:
History:
1. FM-Update via Line6Utility was interruptet (Win10x64): after that Amplifi was still usable but no firmware was showed in the Line6Utility and no update was possible. Even with Factory Reset and Update mode
2. Installed the newer Line6Update-tool and the newest driver (not sure if the driver was necessary): Amplifi wasn't found
3. Tried Update via Android device with newest App at the time (2.5 or so): the update started but was interrupted...after that amplifi was in recovery mode and not any longer usable (panic comes over me)
4. Trying again with the android app: connecting was possible but no update because it said, I had to update via updatetool
5. Tried all the steps again but with a previous deinstall-install action of all the tools: no difference
6. changed USB-Cable and port (there was no USB-hub between the Amplifi and the pc at all the time)
6. Finally I use my laptop with win7x64 and installed the older Line6Utility: It worked...the firmware that was shown was 2.5...with an f at the end (maybe for fail?)...what ever...here the update worked perfectly
sry for my bad english...hope you can use this information...