Where do I download ACI FLEX Ordering Software? Lisa Downing September 23, 2022 19:18 Updated How to download our ordering software, ACI FLEX Click here to download. Related articles I'm having issues running FLEX on my Mac. I received an Error 1001 message trying to launch/ install FLEX. What specials do you have going on right now? When will I get my order? How do I get Java to work on my Mac? Comments 0 comments Please sign in to leave a comment.