UPDATE: I fixed it, somehow. I think the Homebrew Browser saved me. First I grabbed the "FCE Ultra GX Channel Installer 1.3" and installed it to my SD card. Then I started up Homebrew Browser, and went to its "View Installed Apps" menu. It showed a little yellow question mark next to the FCEU Channel Installer. I let it run its "Update", and then I went back to HBC and ran the FCEU Channelby Pulsar5271 - Homebrew Applications
I recently made the mistake of using the Wii's built-in method of removing the FCE Ultra Channel that appears on the Wii Menu, outside of the Homebrew Channel. Now the channel is gone from the Wii Menu, but there's a "?" entry taking up 15 blocks in the Wii's data menu, and an entry still shows up in AnyTitle Deleter Mod. If I try to delete it in ATDM, it locks up no matter whichby Pulsar5271 - Homebrew Applications