Cleaning up the boot screen entries (recover accidentally hidden "macOS", remove untitled entry)

While trying to clean up Clover's boot screen, I made a little bit of a mess. I've got two problems:

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1. I accidentally hid the macOS volume, so I can't enter it anymore. This happened because I added the labels "Media" and "Backup" to be hidden via Clover Configurator (from this menu - not my image), the goal being that two drives under those names would no longer appear on the boot screen. It worked, but for some reason it also hid the macOS entry.
2. I've got an untitled Windows entry ("Boot from ") that does nothing and I've got no idea how to hide.

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This is how my boot looks like now ^Help!

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I recall there was a way to edit config.plist from the boot screen, which would help with the first problem to an extent, as I could delete the hidden labels and make the macOS entry visible again (but then "Media" and "Backup" would appear too).

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