I didn't know this existed! It looks cool, but I also don't think I'd ever have a use for this, even though I do a lot of removable, The problem is that these designs they show are entirely theoretical, people's teeth don't usually look perfect, ideal, or in a perfect arch. The only thing I could consider this program being useful for is to show RPD designs on a case presentation.
Unless that's what you're looking for, I think there might be a bigger issue at play here! 🙂 I remember when I was taking RPD in school, they throw so much at you, and they make everything seem so complicated, and like there are a million choices to possibly make for every case, and it was co cloudy and confusing. It suddenly all clicked for me one day when i came to a realization - 90% of the stuff they tell you about you'd really never use, and there are really only like less than ten design components you'd ever really use. After I realized that, it would only take me seconds to come up with an RPD design.
For Upper cast partials the major connector is going to be a horse shoe indexing into the anteriors (most of the time), palatal strap, or full palatal coverage (in cases of minimal retention, like just having two canines. Clasps are going to be mostly C clasps with reciprocating arms, and occasionally an I bar for canines. You're going to need rests on the abutment teeth, on uppers in general you can just do the side of the tooth facing the empty space. If you're only missing teeth on one side, you're going to need to do an embrasure clasp - usually between the second premolar and first molar - where you need to make space over the marginal ridge for clasps to go through to the buccal.
For Lower cast partials the major connector is essentially only going to ever be lingual bar or lingual plating. Use lingual plating if you have concern about the perio condition of the anteriors - if needed, you can extract and add a tooth to lingual plating, but not to a lingual bar. For Clasping, you're looking mostly at the RPI or RPA on premolars, meaning a mesial rest, distal guide plane, and I bar or Akers ( another name for c-clasp), just depending on the contours of the tooth - if you don't have enough room because the gingiva is too close to the height of contour, or big and bulky, use a C-clasp. For canines you'll do a cingulum rest (make a 2mm wide 1mm deep shoulder on the cingulum with a flat ended diamond), and usually always an I bar.
Using those general rules of thumb, you can design nearly any RPD in minutes. Also, you can eyeball the undercuts - no one actually uses a surveyor in their office, and the lab will survey it and place the clasp where needed. You just need to make sure there IS an undercut.
Find a few clasps and draw designs on them, doing it on paper can be really hard to visualize sometimes.
Good luck!
***And yes, I realize that these are some big generalizations, but 95% of RPD cases are fairly simple, its the other 5% that you may need to think outside of the box a bit
