OK, here is what I suggest.
For each preset that you can switch to create a translator with incoming trigger of On Activation and an outgoing action with this raw text stream. I read the that Microfreak understands all-notes off CC which is CC 123 (0x7B) so you can send this on all channels with the following raw hex.
B0 7B 00 B1 7B 00 B2 7B 00 B3 7B 00 B4 7B 00 B5 7B 00 B6 7B 00 B7 7B 00 B8 7B 00 B9 7B 00 BA 7B 00 BB 7B 00 BC 7B 00 BD 7B 00 BE 7B 00 BF 7B 00
Put it as the first translator in each preset, that way all notes will turn off prior to any other translators processing.
Of course, if you are only playing on 1 MIDI channel you can just enter the 3 bytes for that channel. For MIDI channel 1 it would be B0 7B 00.
Steve Caldwell
Bome Customer Care
Also available for paid consulting services: bome@sniz.biz