OK, there's really been a bug if there was only one entry in the menu...
I fixed that, and added a selectable DPad handling (in "Activation"). The old one was made for single column views, while there can be multiple with the new skins. The first two possibilities seem to be the same (left/right vs. prev./next entry), but they differ if the items are shown column-wise, like in the landscape view of the default skin.
Download 2.0b15
To install the attached skins, unzip them and copy the contained folder to the Skins subdirectory of the MortButtons directory on your device (e.g. Mobile device\Program files\Mort's MortButtons).