I hope that I found the root cause for this issue: it seems that some years ago I changed a certain detail in MIOS8 and adapted all applications - except for MIDIbox FM! 
Please try this firmware: http://www.ucapps.de/mios/midibox_fm_v1_4i.zip
Best Regards, Thorsten.
I checked Martin’s issue on my MBFM and it seemed to react as Martin said. Changes to WT seq. steps above 16 changed on all patches immediately. But after I uploaded version MBFM 1.4i this issue seemed to be solved, All steps react the same and changes are only saved for the selected patch now. Thanks Thorsten, really unbelievable how you keep track on all those apps.
Cheers,
Roel
Sorry for the delay. Yes. As Roel found, it looks to be working correctly now. Thanks! 
Martin.
Just noticed this util.. Looks very interesting.
Currently cant get it to makes changes - the Send Request button resets values to some preset state and the CC# always jumps back to 21: OP2 Multplier. Am I doing something stupid?
I have sound and can change patches using the tool so I have connectivity..
thanks,
Paul
Hi Paul,
from what I remember, the ‘send request’ button switches to the selected patch and imports the sequencer settings. If the patch does not have the sequencer already running you will need to turn it on. (Switch ‘Sync’ to ‘note’ or ‘free’) The rest of the sliders etc. change the steps.
Martin.