Hi,
The fact that the cancel button is not shown properly is probably due to that: you updated from an older version and you did update your translation file and you customized your CSS file.
In order to fix that, you can edit your translation file (under the configuration in the tab languages) and add a line like this:
HIKA_BACK="Back"
Then, in the configuration under the tab display, you can edit your CSS file and add the line
.icon-32-back {background-image:url(../images/icons/icon-32-back.png);}
If you need to tweak other things, you can either change the HikaShop CSS file in the configuration under the tab display, or edit the PHP/HTML of the views via the HikaShop menu Display->Views. There, the account view can be found by searching for "cpanel" and the orders listing file is the file listing for the view order on the front end.