I had Quick Cart version 3.7 and I decided to install latest version 4.2. Everything was fine. But when I converted database using your tool converter_v3.x-v4.x.php it showed that db was converted successfully. I checked the site - it works perfectly. But when I go to admin panel and click on "Pages" tab it shows me on top:
Notice: Undefined offset: 5 in www/core/pages-admin.php on line 34
Also when I go to settings it shows me on top:
Notice: Undefined offset: 5 in www/core/pages-admin.php on line 129
Notice: Undefined offset: 5 in www/core/pages-admin.php on line 129
Notice: Undefined offset: 5 in www/core/pages-admin.php on line 129
Notice: Undefined offset: 5 in www/core/pages-admin.php on line 129
Notice: Undefined offset: 5 in www/core/pages-admin.php on line 129
I don't have these errors when I use clean install.
To convert the db is one thing, to adjust other files is the second step. The menuTypes are defined in config/lang_xx.php Look into your old version and transfer the menuTypes to the new QC.