RPGMaker XP example game "Knight-Blade" does not run

[Mikestro]

Judging from the error, I would assume it's caused by an unimplemented function in OpenRGSS. Downloading the example XP game from here, and attempting to run the game using openrgss-rpgmaker results in the following error:

/home/mwillis/.rvm/gems/ruby-1.9.3-p374/gems/openrgss-0.1.5/lib/openrgss/rgss.rb:134:in `load': undefined class/module RPG::MoveCommand (ArgumentError)
from /home/mwillis/.rvm/gems/ruby-1.9.3-p374/gems/openrgss-0.1.5/lib/openrgss/rgss.rb:134:in `block in load_data'
from /home/mwillis/.rvm/gems/ruby-1.9.3-p374/gems/openrgss-0.1.5/lib/openrgss/rgss.rb:133:in `open'
from /home/mwillis/.rvm/gems/ruby-1.9.3-p374/gems/openrgss-0.1.5/lib/openrgss/rgss.rb:133:in `load_data'
from KN_Custom:535:in `main'
from Main:13:in `<main>'
from main.rb:72:in `eval'
from main.rb:72:in `block (2 levels) in <main>'
from main.rb:72:in `each'
from main.rb:72:in `block in <main>'
from /home/mwillis/.rvm/gems/ruby-1.9.3-p374/gems/openrgss-0.1.5/lib/openrgss/rgss.rb:103:in `rgss_main'
from main.rb:72:in `<main>'

[zUltimaPG3D]

as old as this issue may be, this doesn't allow reading from encrypted archives, at least that's what it looks like