Ok this post convinced me to switch back to Core: https://t.co/aj2CuGINLn

Then follow the steps here but do it for core instead of knots: https://docs.mempool.guide/page/migrationumbrel.html

And run this command instead: cd umbrel/app-data/ && sudo rm -rf bitcoin/data/ && sudo mv bitcoin-knots/data/ bitcoin/ && sudo rm -f bitcoin/data/app/bitcoin-config.json