@picree:
Uninstallers don't touch anything that's in the userdata partition, because it's, well, user data, and we can't risk deleting something custom.
Doing it right would involve building a manifest of what's ours and has no reason to be user-edited, which is a rather large hassle for no good reason

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If you simply moved around your old extensions folder, you basically did a whole lot of work for nothing

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I'd rip it out entirely, leave installing stuff in there to update packages for hacks, and install pure extensions over Terminal.
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gawk doesn't do anything until you install it, which involves manual interaction in the KUAL > submenu, so that's easy enough to check. (Never had any issue with it, though).
c.f., the final letter of the KUAL version tag: ,a -> busybox; ,g -> gawk