Hi,
First, I recommend you to restore a backup of your website.
Then, you have to check that you right have customized HikaShop using the right internal tools ; so you right have view override and CSS override.
If you have modified at least one single core file, his content will be overwrite during any update.
www.hikashop.com/support/documentation/1...ize-the-display.html
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.