ahh I see the problem... is Construct a verb or a noun?
to build something is to: conSTRUCT
a building is a: CONstruct
Since C2 is software, it's a noun. Like for example when using Microsoft Word I never say: I'll be Wording all day. Instead I'd say: I'll be using Word all day.
it's settled then, everyone who puts the accent on the 'struct' is wrong.