▁it ▁in ▁the ▁form ▁of ▁easily ▁install able , ▁pre - comp iled ▁packages . ▁The ▁source ▁code ▁of ▁every ▁stable ▁and ▁development ▁version ▁of ▁K DE ▁SC ▁is ▁stored ▁in ▁the ▁K DE ▁source ▁code ▁repository , ▁using ▁Git . ▁K DE ▁Platform ▁is ▁lic ensed ▁under ▁the ▁L G PL , ▁B SD ▁license , ▁M IT ▁license , ▁or ▁X 1 1 ▁license . ▁App lications ▁also ▁allow ▁G PL . ▁Document ation ▁also ▁allow ▁F DL . ▁C Make ▁modules ▁must ▁be ▁lic ensed ▁under ▁the ▁B SD ▁lic ence . ▁ ▁Major ▁releases ▁Major ▁releases ▁are ▁releases ▁that ▁begin ▁a ▁series ▁( version ▁number ▁X . 0 ). ▁These ▁releases ▁are ▁allowed ▁to ▁break ▁binary ▁compatibility ▁with ▁the ▁prede cess or , ▁or ▁to ▁put ▁it ▁differently , ▁all ▁following ▁releases ▁( X . 1 , ▁X . 2 , ▁...) ▁will ▁guarantee ▁binary ▁port ability ▁( API ▁& ▁A BI ). ▁This ▁means , ▁for ▁instance , ▁that ▁software ▁that ▁was ▁developed ▁for ▁K DE   3 . 0 ▁will ▁work ▁on ▁all ▁( f uture ) ▁K DE   3 ▁releases ; ▁however , ▁an ▁application ▁developed ▁for ▁K DE   2 ▁is ▁not ▁guaranteed ▁to ▁be ▁able ▁to ▁make ▁use ▁of ▁the ▁K DE   3 ▁libraries . ▁K DE ▁major ▁version ▁numbers ▁follow ▁the ▁Qt ▁release ▁cycle , ▁meaning ▁that ▁K DE ▁SC ▁ 4 ▁is ▁based ▁on ▁Qt   4 , ▁while ▁K DE   3 ▁was ▁based ▁on ▁Qt   3 .