Tunebite Error when removing DRM protection from WMV HD video clips

Hi Guys

I've tried Tunebite Platinum, legally purchased. Some of the clips are in HD, which means they're massive. Some are over 300MB, 4099kps. I cant find the beat output on TB. Ive used WMV7 2048kps output previously and it worked fine, but on these HD clips it doesnt. I get an error message at the end of the conversion which suggests to reduce the resolution in options. Ive tried that and it gives completion times of 12hrs+!!! If theres any TB experts Id appreciate some guidance.

Thanks for reading if you did. Im desperate to get this sorted, any assistance would be greatly appreciated.

Wobble