▁ 2 0 0 6 , ▁both ▁development ▁branches ▁were ▁merged ▁again , ▁and ▁dual - lic ensed ▁releases ▁were ▁still ▁provided . ▁ ▁Ghost script ▁is ▁currently ▁owned ▁by ▁Art if ex ▁Software ▁and ▁maintained ▁by ▁Art if ex ▁Software ▁employees ▁and ▁the ▁world wide ▁user ▁community . ▁According ▁to ▁Art if ex , ▁as ▁of ▁version ▁ 9 . 0 3 , ▁the ▁commercial ▁version ▁of ▁Ghost script ▁can ▁no ▁longer ▁be ▁freely ▁distributed ▁for ▁commercial ▁purposes ▁without ▁purch asing ▁a ▁license , ▁though ▁the ▁( A ) G PL ▁variant ▁allows ▁commercial ▁distribution ▁provided ▁all ▁code ▁using ▁it ▁is ▁released ▁under ▁the ▁( A ) G PL . ▁Art if ex ' s ▁point ▁of ▁view ▁on ▁" aggreg ated ▁software " ▁was ▁challeng ed ▁in ▁court ▁for ▁Mu PDF . ▁ ▁In ▁February ▁ 2 0 1 3 , ▁Ghost script ▁changed ▁its ▁license ▁from ▁G PL v 3 ▁to ▁GNU ▁AG PL ▁in ▁version ▁ 9 . 0 7 , ▁which ▁raised ▁license ▁compatibility ▁questions ▁for ▁example ▁by ▁Deb ian . ▁ ▁Vari ants ▁and ▁for ks ▁▁ ▁Al add in ▁Ghost script ▁ 5 . 5 0 ▁( 1 9 9 8 - 0 9 - 1 7 ) ▁and ▁ 6 . 0 1 ▁( 2 0 0 0 – 0 3 - 1 7 ) ▁ ▁AF PL ▁Ghost script ▁is ▁Al add in ▁Ghost script ▁under ▁the ▁AF PL , ▁ 6 . 5 0 ▁( 2 0 0 0 - 1 2 -