How do I enforce an expiration date for a trial install of my software?

Question

I need to offer a trial period for my custom software. I have a 64-bit C# app, which uses 64-bit, multi-processor support DLLs. Other utilities to be included are written in C++

Answer 1

Perhaps a better idea is to give away, for free, a smaller application that has only minimal features. Customers then pay for extra features or add-ons.

In my application, people have suggest that I offer more data for a fee. The application would be free with minimal data. Another idea is to go the subscription fee route for the advanced data access.