None of the older versions are supported. The companies that created them went out of business. Windows 10 often won't allow them to fully function and will make your recipes disappear from the program. It's happened to numerous others.
Before you do anything, make sure you have backup copies of your files. See this:
You should check to see if Windows moved them to a hidden location on your computer as explained here:
This article explains how to transfer your files into MasterCook 2020:
We have several MasterCook products.
- MasterCook for Windows which is just like all previous versions of MasterCook. It does not use a subscription, but it can work with a MasterCook.com subscription if you wish.
- MasterCook.com which works from any computer or device. This works great as a backup of your recipes. Many use it this way.
- A free mobile app in the Apple App Store for iPhones and iPads. It works with a MasterCook.com subscription.
- A free mobile app in the Google Play Store for Android phones and tablets. It works with a MasterCook.com subscription.
This article explains the different MasterCook products and how they can work with each other:
There is a comparison chart on this web page that shows the differences in functionality between our products:
Those who need the most functionality purchase the MasterCook Windows product that has been a popular program for many years. Those who need to use it with their mobile devices purchase a MasterCook.com subscription and access their online content with their mobile devices directly from the website and/or with the free mobile apps.