You could have downloaded SwissSys 9.06 from our software library for free. The program relates to Home & Hobby Tools. The program's installer is commonly called swiss8.exe or swiss9.exe etc. The most popular versions of the SwissSys 9.0 and 8.9. The actual developer of the software is SwissSys Software.
From the developer:
SwissSys is an easy-to-use chess tournament pairing software. The app lets you print out pairings, standings, wall charts, upset results, new ratings, and lots more. It can import player registration information from the USCF supplement on diskette with just a few keystrokes.
You may want to check out more software, such as Perf'Control Personal Edition, Soccer-Trainer or FormGenie, which might be related to SwissSys.