FWIW, right clicking on Unkown entry (as child in family view) and selecting Manual Merge produces error popup "Access violation at address 0138C815 in module 'RoogsMagic.exe'. Read of address 00000000."
I assume this is just some non-defensive [sloppy] programming dereferencing with checking for null pointer, rather than an actually useful fact, but including for completeness.
After selecting the [Unknown] [Unknown] record in the side bar menu
Then re-select that record in the main view (Family View would be my preference)
Edit > Delete > Person
Thanks. There is a RIN. I selected in the sidebar, then selected in main (Family) view and chose Edit->Delete->Person. However, nothing appeared to happen. No message, but the entry was still there. I also tried adding the Unknown entry as a child to myself and deleting it, but that also didn't do anything.
Does/can RM do any logging that might clarify what's happening.