Filemaker 11 is not compatible with High Sierra. I checked out Tap Forms. It failed because …
1. Tap Forms Mac 5.app stores its database files in ~/Library/Containers/com.tapforms.mac/Data/Documents. I prefer not to use apps that store data in unorthodox places, it makes backup and restore too difficult. It’s much to easy to lose track of files and uninstall is more complex. This is, however, an Apple design practice — MarsEdit does the same thing.
2. I choose a csv file to import and I renamed the fields in the import dialog as below.
After import the fields had the original names.
I found two significant problems in 5 minutes of testing. The first is a design choice I dislike for this type of app. The second is a bug - an obvious bug found on the very first thing I tested.
Tap Forms is not a viable choice for me.
Also, uninstalling is the usual pain — but that’s a longstanding Apple issue.