I have this hybrid and I have memopad. I used the Rogers .282 OS as my base.
I don't think the hybrid deletes files, it only adds files to and overwrites files from the initial base OS installation. I would assume that the hybrid doesn't come with memopad, so if its missing from your original OS, you won't have it after you setup the hybrid.
I have tested all Xonz hybrids with .266, .282, and .291 as base and memo pad has always been there. I would try reinstalling the base OS, then re-run the hybrid .exe. This will definitely put memo pad back in the loader options.