welcome to the Hook Productivity Forum, @thirstylizard. And sorry that your first experience was a beach ball.
Have you disabled SIP (System Integrity Protection) per chance? if that does not ring a bell, then likely you have not.
Could you please take a sample of the process , store it in a file, compress it, and send it to me as a PIM or email it to firstname.lastname@example.org ?
Here are instructions from an august Mac dev, The Omni Group Taking a sample in macOS - Support - :
what does it mean to sample a process in … - Apple Community
You should not need to uninstall / reinstall the Hook app itself.
Hook is currently a “background app”. Background apps don’t appear there, nor in macOS application switcher. We are discussing internally whether to give users the option to make Hook a foreground app. And it may evolve that way due to other features we would like to build into Hook.