To deactivate the mods, just go to your EverQuest II folder and delete eq2.ini -- then you'll use the default UI (assuming you don't keep running the Profit updater).
Opening hotbars is the same in any UI. First, it's easiest if you right click, go to hotbar options, and turn the spinner on. Then you can use the spinner (the two arrows with the # in between) to move your hotbar around, and also as a place you can right click and choose to open a new hotbar. You can also use the hotbar settings window to resize your hotbar windows' icons to your liking.
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