Here you can find the slider height settings – https://prnt.sc/MFN1gqRA6l9U
Likely it is cache of your browser. We do not have additional cache from the theme, except, Static Blocks Cache and Menu Cache in Theme Options > Speed Optimization.
We can see CDN on your site https://prnt.sc/qKv10FEEXXRt , so clear CDN cache also.
One standard license is valid only for 1 project. Running multiple projects on a single license is a copyright violation.