Here is a link of specs for the h193x series. On it, unfortunately, it says Resco File explorer is only on the 1935, which doesn't make sence since the CD is slated for the 1900 series of handhelds.
I also got it with my 1935. Have you thoroughly checked the CD? It didn't jump out at me right away. It wasn't listed under any of the headings like 'entertainment' or 'productivity'. It was listed under 'HP 1935 software' I think.