SwiftView tries to install every time I run it

This issue can occur when trying to run SwiftView by opening svinst.exe (the installer) instead of sview.exe. The icons are identical.

To resolve this issue:

Run SwiftView by opening sview.exe instead of svinst.exe. If file types have already been associated with svinst.exe, you will see the FileName Is Not A Valid Win32 Application error.