Training Program Development

I have recently accepted a position at my company as production trainer where I have also been tasked with developing the programs for different areas. I am currently using a self-made template for "lesson plans". The issue is that there are over a hundred lesson plans for one job title and evertime changes need to be made within those plans, I have to individually make the changes to each one.  My question is, if there is a program that I can use to input all of the lesson plans and training information into that would make it more efficient when changes need to be made? This would also need to be something reasonably priced if there was cost involved. Thank you for any feedback you may have.