If the software will not open, this may be due to an issue with the specific version of the Microsoft .NET framework on the user’s PC.
When Microsoft released .NET framework 4.5, it had a bug that prevented a lot of software packages—including ours—from running properly. They have since released 4.5.1, 4.5.2 and other subsequent versions, which work fine with our software. Updating is only required and recommended, if the computer specifically has .NET framework version 4.5.
Go to Control Panel in the Start Menu and select Programs and Features. Scroll down to the listing for Microsoft .NET Framework and check the full name and the specific version number. If the installed version is Microsoft .NET Framework 4.5 (actual version in the right-hand column may say 4.5.50709) rather than 4.5.1 or 4.5.2, then that is likely the issue. Note, the new 4.6.1 and later versions included with Windows 10 should be fine as well.
Microsoft has since patched this version to 4.5.1/4.5.2 as they inadvertently affected many small software companies like us. .NET 4.5 changed a registry function that doesn’t work with our software or many other packages.