Have recently upgraded to BGP 6 and I was on Program Selection Screen. I clicked on process standing orders (although I had not noticed it said that), a button which is about where one I sed in BGP4 used to be. Could not see any SOs.
Eventually worked out that all SOs appear in Set Up Standing Order (BS423SO1) on the left. This is where I used to process them.
Incidentally, in Planner accessed from BS423SO1, it says Double Click on line to select. Nothing happens! (Double click to edit works OK in main screen)