Hi,
1/ Create a "vendor listing" menu in your website ; choose an short alias for this menu (like "vendor").
2/ Select this menu for "Vendor default menu".
If you have the HikaShop option to remove the product_id/category_id from the SEF url, HikaMarket will also remove the vendor_id from his.
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.