I jumped the gun and typed "set update channel to beta". Logos began downloading an update, but before it was finished I read the wiki and decided I'd made a mistake. I typed in "set update channel to default".
When the update, which I assume was a beta version, finished downloading and started to install, I cancelled the install.
However, now when I start Logos it asks if I want to install an update. So far I've said no. However, how do I get rid of this pending update (which I assume is a beta version) on my computer so I won't accidentally install the beta and end up on the beta channel?