Hi,
It's the "bootstrap design" setting in HikaShop ; but it requires a template compatible with bootstrap 2.
Otherwise, you can use a view override in order to just force the new design of the progress bar and complete if requires your template CSS with some required CSS bootstrap 2 rules.
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.