Hi mick no you dont need to register yet I think the program tells you how many uses/days you have left, I found during my trail of it that if you open then close down the program to much you will get less than the 3 months trail, so minimalise the program rather than closing it more than once a day. did you mean the jobs are showing on the work sheet from the printer twice? if so check your print to date before you press print you may be printing the schedule for 2 cleans.