The program worked very well when first installed. Then your free demo period expires and the friendly program becomes a bully. You cannot start OE without it asking you to buy the pro version, and your choices to its request are "Now" or "Later". There is no "Thank you very much, I only want the free version" although it would have to be a big button to fit all that, I suppose.
Second, every email you send goes out with the footer that you are someone who is too cheap to pay for the program, this is only the freebie version.
Which is he greater annoyance? Which is the greater spam- unsolicited emails for Viagra and hot stocks or a program that is supposed to make your email experience better, but instead multiplies your annoyance level? We are removing this program- not because it doesn't work, but because it works too well.