I am using ARC500 on a Windows 7 64-bit computer to program a GRE PSR-500, which is identical to the RS PRO-106 as far as the scanner's software is concerned. I'm also completely new to trunked scanning and to "object-based" scanning.
I do not think the ARC500 software is too difficult to use. Using it helped me to understand how trunking system control channels and talkgroups are entered into the scanner, and how they are related to each other. I also liked being able to navigate to the different types of scanner "objects" using the folder tree-like menu on the left side of the software window. Conventional frequencies are listed in one folder-like area, talkgroups in another, and trunking systems in a third. There is a fourth section with a tabbed window in which you can made adjustments to all of the scanner's global settings.
Also - there are some global settings in the scanner that can be changed ONLY by using some kind of programming software. One of the settings for which you need computer software are the voltage levels for the "Battery Low" warning icon and alarm.
If you haven't seen it yet, check out the Easier to Read Manual for the PRO-106/PSR-500 here: Easier to Read Pro-106/197/PSR500/600 Digital Scanner Manual
. This will tell you how to change the Battery Low warnings, and other settings.
I also splurged on a 1-year membership to RadioReference.com so I could download trunking system control channels and talkgroups directly from the website's database using the features which are included in ARC500 for that purpose.
The RadioReference.com Wiki has a page of instructions for how to download, install, and start using the ARC500 software. I followed the instructions on this page, and I didn't have any problems getting everything set up. The Wiki page is here: ARC500 User Guide - The RadioReference Wiki
Please note that ARC500 is NOT compatible for use with a Mac computer.
The ARC500 software comes as a 30-day trial version. I have been programming and re-programming my scanner using the trial version for nearly 3 weeks, and it doesn't seem to have any limits except the 30-day time limit.
I think Win500 and PSREdit500 also have trial versions, so you can try all three to see which one you like best before buying anything. I like ARC500 well enough that I have ordered the CD version, but you can also just buy a code from the manufacturer to unlock the trial version after 30 days if you decide to keep using it.