The $50.00 "CUT" version of VM is the entry-level. (The 'trial' or 'demo' version mentioned by Haumana above is offered for download to explore the features and interface, but is cutting-disabled).
You asked about choosing between SCALP and VM, and I gave you an answer (my opinion). Illustrator is a fine design program, to be sure. Just as Inkscape can also be utilized for vector graphics, it's up to you regarding what application to work within while putting together cuttable files. If all you need is a functional way to get that cutter to work/communicate, then SCALP is sufficient (once you sort out the COM issue).
I'm not a graphic designer. My work consists of text-based signage, single color lettering primarily, for banners, vehicle door magnets, window decals, job-site signs, simple things like that. My primary way to get my work accomplished is through an old software (that used to be provided with all US CUTTER machines) called SignBlazer Elements.
I dont think you have a 'driver' problem, you likely have a COM selection problem.