Hi Jonathan and welcome
Glad you joined us... currently the forum is in maintenance (Joe and the NESMaker team are reorganizing everything... and looks like a lot of sections/posts/ just disapeard... temporarly)
But evertyhing will be back soo.
For your 32bit problem...
First, you should try replaceing the 64bit dna.dll that is currently in your NESMaker folder with the 32bit one from here: https://drive.google.com/file/d/1d65hkNZGMink_lz-b4bWjaxnX43GpEuN
Then if you still have crash, I would suggest you to contact Josh Fallon (one of the dev of the NESMaker team) on the NESMaker Facebook group, he will do some other tests with you.