I think that was part of the old guide. You had to delete nektulos and lavastorm because otherwise you'd have the "new" versions and if you tried to zone into one of them you'd be in a void. No issues if you forgot - you could simply delete them any time and just re-extract the latest patch.
You can find the current guide at the top left of the home page, or here:
https://www.project1999.com/forums/s...ead.php?t=2651
You can change keybinds in options (alt + o). Although how frequently do you really need to open your inventory window?
You cannot have more than one hotbar visible as that functionality was added outside of the classic-velious era. However, you can have multiple pages of hotkeys on the one bar - and changing pages is as as simple as (shift + 1-9).
-Mcoy