Google Merchant Feed Generator

Excuse me if I'm in wrong section forum but I don't speak German, I speak only Italian, English and Russian.

Hi, I'm interested to your Google Merchant feed generator, but I've some questions :
1 - is it compatible with Joomla 3.6.5 and Virtuemart 3 ?
2 - is it only in German ? Or in English ?
3 - is there a support after bought ?

Thanks for your answers.