devs, help me! My coins should have matured for a long time.
Time wise, yes they should have... but unfortunately the wallet measures time in blocks, and is expecting one every 60 seconds, so that makes the 1h (v1.0.1.1+) maturity 60 blocks (if you have v1.0.0.1 it's 60 x 24, that's why it was changed). If you hover over that transaction you'll see Confirmed ( XX confirmations) and that number needs to be 60.
I have a block that is at 59 now...... sooooo close!