Forced subscription?

Been using Abode to fill out PDF's forever. Recently on the desk top every time I try to open a PDF a pop up opens and says I have to get a subscription? Why is this? Tried reaching Adobe customer service for help and it wouldn't let me through because I wasn't a paying customer? I'm not try to be a vet flake, but I think it's ridiculous that a veteran (or anyone) has to pay for a subscription just to fill out medical/disability forms for the Department of Veterans Affairs. Some of us are on set incomes and can't afford the $14-$25 a month expense!