When I edit a pdf, Acrobat refuses to let me save it. It tells me I'm not authorized to do that. I save it under a different name and then try to delete the file that I don't want, and it won't move to the trash can either. If I try to overwrite an existing pdf with a new file of the same name, it says it can't do it. It won't work until I open task manager and stop acrobat and then try. I cannot do this every hour at work. I really want to get the 2018 version back, but I can't find it anywhere.