Please forget what I have written about frontend / backend language. Both are supported as in v1.6 I just put in 'True' instead of 'Yes' for English language. Corrected this and is working again.

Still, '1' doesn't work.

However, reading your post again, I'm not sure whether the private v1.7 you sent me is the one supposed to fix this issue or whether I shall wait for the official v1.7?

Sorry for any confusion I may have caused!
Manfred