I have used version 11 and 12 with no problems, but after installing 13 then opening old files there are little computer icons and padlocks where the equals signs were. Also on longer calculations there are arrows and blocks everywhere.
What am I doing wrong??? I thought they might go away when printing, but they are still there! help!
What am I doing wrong??? I thought they might go away when printing, but they are still there! help!