True Launch Bar v6.6.4 beta

I really don't see any ability for "deleting the options for the first menu level." Perhaps a short how-to, click by click or even a video tutorial?

This possible in version 6.6.4 only. Right-click any toolbar button, select "Customize menu", find the drop down list with the "Menu Level" label. In your configuration only the "Submenu level - 1" will be in the list. Press "-" button at the right side of the drop down list.

Or wait for the next version. I've found the way to correctly convert settings. At least it works well with your configuration.