Towards recovering a wallet with less than ten transactions, looking to run the --prune-blockchain flag within the GUI.
I'm selecting options as:
Simple mode Easy access to sending, receiving and basic functionality.
Explicitly not selecting:
Simple mode (bootstrap) Easy access to sending, receiving and basic functionality. The blockchain is downloaded to your computer.
Even in the advanced mode options there are no options for manually entering such flags, at least that I see.
