I can't send any coins anywhere if I can't import incompatible key files from an older version of the wallet. That's the problem I'm trying to fix.
The swap document linked above leads you through the process to swap you coins and details each step. It's not as simple as opening your old wallet or importing your old key. You must swap to the new network and the document provides instructions on how to do so (aka you will send your old coins to the bot using the old software, then you will receive your upgraded coins which you will then withdraw into a new wallet on the current network).