Hello,
It is very difficult to help a person who does not say really important information.
What operating system you have installed?
How long OS it been not updated?
Similar problems (like yours) occur in people who have a problem with the operating system itself, not with the program.
The program uses .net technology and therefore it has the minimum system requirements is Windows 7 SP1 with a preinstalled package from Microsoft .Net 4.7.2
If we assume that you have this package, but the problem still takes place to be, then I recommend that you diagnose your operating system to find errors and then fix them.
Even if you do not need it to install ModStation, then you will definitely need other programs to work correctly for you.
With respect,
https://dotnet.microsoft.com/download/dotnet-framework/net472 https://support.microsoft.com/en-us/help/17590/automatically-diagnose-and-repair-windows-file-and-folder-problems