You tell us only a half of your story...
Reflash by usbasp or USB?
Reflash only english you have Valid Lincense For English - reflash again with German (test-choose ok for firmware update) - you gonna get Valid License for both languages.
Now, something else I wanna show you:
Temperature test with ATF and GAL HW version- enviroment power up 12v and connected to PC for about 10 min.
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