I think you're supposed to do either one or the other. If you installed the Native HotSpot Mod, that is the only thing you can use. The apps work by hacking the "stock" hotspot/tethering routine. Since you don't have the stock hotspot, things are getting confused.
If you did the mod, simply undo your file changes and restore the originals. The apps should then work correctly.
Samsung Galaxy S® 4 MJA Rooted with CF Auto-Root Tutorial
HTC EVO Design 4G™ v4.0.3 Bootloader Unlocked & Rooted with HTC SuperTool v3
If it ain't broke, use a sledge hammer.