Templates confused, back end template when not nee

Dears, i am sorry, don't want to bother you but small question again. I had a problem that on checkout/step it changes template, puts back end template visible ?!?
I went to display-view, and saw that it took back end template. Images attached.
How to change it, delete it, to disable back end template in ALL front end. ??
As you see, in joomla i defined tempaltes properly.

Please help me asap?

Is it simple to upgrade starter to business , just upgrade upon payment ??

Thanks in advance,
please

Hi,

I think that your component which is changing your backend interface can interact with the templates assignation.
Try to disable it to see if the templates get back on the good views.

To upgrade, you just have to install the business package with the joomla extension installer, it will be installed over the old HikaShop, and you would not loose your changes.
Don't forget to backup your site before.