System change
-Added system message when downloading Virabot.exe

Balance adjustment
-Hyperlink with more than 3 range get +1 cost

Bugfix
-Fixed a bug where clicking on an empty area in the link settings screen would cause a crash when more than one page was available as a link destination from a hyperlink.
-Fixed a bug where resources could decrease below zero when rapidly placing blocks with continuous placement enabled.
-Fixed a bug where backdoors close twice.
-(Mod) Fixed a bug where the damage statistics in Firefox Mod were not properly reflected.