I'm no expert on Noteworthy but I've fixed this sort of problem in other notation editors e.g. Sibelius. It might be possible to do something similar in Noteworthy.

Method 1 - change the length of the first bar to 1/32 and get the program to re-draw the rest of the tune. Sibelius can automatically combine tied notes.

Method 2 - select all but the first 1/32 rest. Copy and paste it into a new file.

Editing the midi to remove the rest can be done with a midi sequencer or you could investigate a pair of programs called midi2text and text2midi which are normally used for posting midis to discussion groups as text. It might be possible to convert your midi to text, edit it and convert it back. This is just a thought, I've never tried it.

Mitch