My header banners don't work after going from v139 to v150

Hello. I was wondering if somebody can help me with my problem.
After installing my shop template on the newer version of Zencart (1.50), my header banners stopped working. Everything worked just fine on Zencart 1.3.9h. I double checked all settings, reinstalled Zencart, re-uploaded template, but the header banners are still gone. Any Idea what is going in?

This is how working template is supposed to look like:

This is the same template installed on Zencart v 1.5.0

http://tsnlab.com/zencart/

Suggest that you download all the files for both installed versions your v1.3.9a files and your v1.5.0 files

Then run a dif application comparing both sets of files - I suspect that you will find that there is a difference and most likely in the template files

You are using a Template Monster template and they are known to break basic ZenCart functionality

Further, in the upgrade(s) of ZC versions as compared to the template, when installing the template to 1.5.0 (software that is already 4+ years old) what comparisons/updates were made compared to the template_default/non-overridden versions of the same files? There are likely differences in those that are not merged.