Product image squashed after update Hikashop1.5.6

Hi,

I updated to Hikashop1.5.6 today.

Then the product image in the product page became squashed.
I checked the control panel but everything same as before update and I can't find anywhere to change it.

Could you please help me to fix this problem.
Thank you very much.

Saya

I am sorry, I fixed it by myself.
I just needed set up again Configuration>Files tab after update.
Thank you very much.

Saya