Nitro pdf / Bait & Switch
Purchased Nitro pdf about a year ago at Office Depot. Have used it past year no problem. Suddenly, it has "converted" to a trial version. Of course, I didnt save the box from a year ago. Unless I pay them ANOTHER $80, and am able to download a "serial number" (never a requirement of the off the shelf product I bought a year ago), it prints a "Trial Version" yellow box at the bottom of my documents. And, of course, they have NO form of online or call-in product support, you can only fill out an online form and have no way of knowing if it will be received or they will respond.
BEWARE of Nitro pd[censored] Dirty business!