How do I get my recipes that are in MasterCook on my computer to appear in my phone or tablet?
First of all make sure you have backup copies of your files. See this:
Then make sure you have .NET Framework 4.7.2 and the latest version of MasterCook on your computer. See this:
Your phone/tablet simply accesses what you have in your online account. To transfer your cookbooks/recipes between your online account and MasterCook 15 on the computer, you use the Sync screen in the My MasterCook Manager on your computer as explained here:
It's very important you follow these tips and best practices when syncing: