If you would like to start fresh with Textual, then click here to download an applet which can be used reset your setup.
WARNING: Unless you have a backup, there is no way to restore preference files once they are destroyed.
Textual maintains data at one or more of the following paths:
~/Library/Group Containers/8482Q6EPL6.com.codeux.irc.textual/ ~/Library/Grou Containers/com.codeux.apps.textual/ ~/Library/Containers/com.codeux.irc.textual/ ~/Library/Containers/com.codeux.irc.textual5/ ~/Library/Caches/com.codeux.apps.textual/ ~/Library/Application Scripts/com.codeux.irc.textual/ ~/Library/Application Scripts/com.codeux.irc.textual5/ ~/Library/Application Scripts/com.codeux.apps.textual/ ~/Library/Preferences/com.codeux.apps.textual.plist
After deleting the items at these paths, a restart of your Mac is required, or you can
kill the process named cfprefsd.
The cfprefsd process is used by macOS to cache application preferences in memory.