Only the Beta works for me but if I change/add resolution ...

[frviana]

I've tried the 3 drivers (non HDR, HDR and Beta)
For some reason only the Beta works for me. The other two I get a yellow exclamation mark and error 31.
The beta works fine but has limited resolution on the XML.
I tried add or change the XML for additional resolution (ipad resolution) but the Display options don't show the new resolution.

[bud3699]

This sounds more like an issue

And in this case Id only the beta works. That most likely means the configurations files are in the wrong folder. Therefore the beta is falling back to its pre-built configurations.

Make sure the files are in the correct folder corresponding to the instructions. The beta release also supports changing directory locations by a registry key if this may be needed