Unlocked Upgrades stopped working
I have had this game on my Droid 2 for quite a while but haven't touched it in many months. I started again in the past week and noticed that at least one if not several of my unlocked upgrades aren't working. I unlocked Air Sniper some time ago and it still appears as "unlocked" on the menu of upgrades. But when I buy Antiair Guns, their range is still only 1 instead of 2. I also previously unlocked Slow Burn but neither Flame Towers or Inferno Towers appear to be slowing their targets. Has anyone else had this problem or can you think of a way to address it without deleting the game and starting from scratch?