Can I run ARC+ 2005 on Windows 7?
Yes, the application works with Windows 7. I have used the official URL to download the installation package and everything worked normally. I launched the application and installed it without errors. I am using Windows 8.1 x64 and I've tested the software on Windows 7 as well.
Download page: http://www.arcfiles.com/public/Downloads/2005/FR/Setup_2K5_B387_FRforvista.exe
Note: As you can see, it specifies that the product is compatible with Vista only, but it works on Windows 7 and Windows 8.1 as well.
Note #2: Make sure to download and install the necessary drivers as well from http://www.arc-techno.com/#!telechargementarc/c11x0