Listen up. You, like everyone else, were mining on the wrong fork for long periods of time. I too lost around 50,000 coins from the wallet forking at various times. Except, neither of us really lost anything because those coins never existed in the first place. The new wallet prevents such issues arising in future. The dev isn't being 'unprofessional' - if it wasn't for him you wouldn't have anything at all. Several people worked very hard to fix these issues and a modicum of gratitude wouldn't go amiss.