Endless time zone update / sunset etc. 2 hours off

Hello,

Since some time ago and even after several regular firmware updates and hard / soft resets and syncs, the watch shows a due time zone update.

I can install it normally, but it still shows up again and again endlessly.

In this context, sunset times (and heartrate statistics etc.) are 2 hours off, was 1 hour before the last time changeover. The normal clock is fine, but did not carry out the changeover to summertime. Also the time sync by GPS does never finish.

I even reinstalled Express and deleted the time zone update file - nothing.

The Garmin support offered me a used spare watch, but I really want to keep mine if possible.

After checking similar threads, I thought that I perhaps can manually exchange the corresponding files on the watch?

Perhaps someone can send me the newest gmaptz.img / D107400AS.img files? 

Thank you very much for your help.

Mario