Hello,
The HikaShop plugin "Google Products" is not compatible with HikaMarket.
It allows to create just one XML file for all the products of the store.
If you want to have that plugin compatible with HikaMarket, it would require a custom development to add new settings and allow the "filename" parameter to be dynamic (depending the vendor ID).
You can use the "Contact us" form if you want more details from the HikaShop support team.
Regards,
Jerome - Obsidev.com
HikaMarket & HikaSerial developer / HikaShop core dev team.
Also helping the HikaShop support team when having some time or couldn't sleep.
By the way, do not send me private message, use the "contact us" form instead.