I bought fm11 last year to companion my FM 11 pro db on the IPad. It is still on my IPad, but I want it on my son's IPad as we'll. (because I work on it a lot. How can I get, copy, or Buy it again. I just don't want to upgrade all my stuff to 12 or 13 yet
FileMaker Go 11 is no longer available on the App Store.
If you originally downloaded FileMaker Go 11 via iTunes, then iTunes will still have a copy of it on the computer you originally downloaded. Connect your second iPad to that machine, launch iTunes, and move over FileMaker Go 11 onto that iPad.