there are 2 different counting standards in the MIDI industry, 0>127 – 1>128.
Most MIDI controllers allow a choice of one of them. So if yours does, you're ok. Otherwise you'll have to live w/the offset. Using MIDI maps shouldn't be a problem anyway.
Most FX processors do not have editors, unfortunately. I wish we could have one for Eclipse..but is doesn't seem to be a priority as other projects are in the works.
all the best