I note that if I disable all Wiimotes, Wii games will boot. Strange! Not a fix but hopefully helpful.
EDIT: Reinstalled 5.0-6335 (again) and Wii games boot again. Also (weirdly) it still had old library values for my collection (the original location I specified when this version was first installed) even though I completely nuked the folder/rebooted phone between installs.
EDIT: Reinstalled 5.0-6335 (again) and Wii games boot again. Also (weirdly) it still had old library values for my collection (the original location I specified when this version was first installed) even though I completely nuked the folder/rebooted phone between installs.