Renee, thanks for your help! Perhaps our friends at Apple have changed the iTunes app?
On my MS Surface 3 Pro laptop, running W/10 with auto-update, I installed iTunes ( v184.108.40.206 ) on Friday, 2/23/2018. There were no previous instances of iTunes on this computer (received as a gift last October).
In this iTunes app, after plugging the iPad, there is no place to select a device at the top, and no place to select an Apps tab at the top either. Under the header bar with the Apple logo at the top, there is a menu bar with 'File Edit Song ..... Help' on it. Under that standard menu bar, there is what appears to be an Apple menu bar offering 'Library For You Browse Radio Store" with a dropdown menu selector on the left for other stuff. Below the Apple menu bar, there is a column giving options for the selections in the above dropdown menu. With the iPad plugged in, the lefthand column displays an device entry for the iPad, but no Apps option.
I have spent some time reviewing all the entries in the many menu selections, and can't find any Apps offering. Is there an Apple guru available?
iTunes no longer supports apps on iOS devices - the packaging of apps has changed such that the versions downloaded are specific to the device and it no longer made sense to have such a subset stored in iTunes as it would not necessarily have the complete app to download to another device. They were stored but would never be used to restore to an iOS device, and were wasting significant amounts of disk storage.
Looking at iTunes on a Mac, there is an icon on the “toolbar” that, when selected, lists the connected (by WiFi or cable) iOS devices. If you select one of those devices, there are a number of panels that can be displayed, starting with Summary, Music, Films, ..... and lastly File Sharing. It is the File Sharing panel that you need. It lists all the apps for which you can use iTunes to transfer files to the iOS device, and RootsMagic is one of them. Select RM from the list and then add the appropriate file and it will be transferred to the iOS device.