Or, you can make a simple calculation: take your hashrate and divide by the net hashrate; a block of about 200 xcn of award is generated every minute, you will take your share of that, but you must take into account about half because of orphans and failed submissions.
The qt wallet should close in some seconds.
Is there anything to be done to optimize orphans? I just mined three blocks within three minutes but two of them were added to my wallet as "generated but not accepted". Is there anything I can do in either the miner or wallet in order to try to reduce this?
Regarding the qt wallet, it seems to take a crap load of time to both quit and to start. Last time I tried to shut down the miner I gave up after 15 minutes and forced closed it. It always takes about 4-5 minutes to start though (SSD, i5-6600K, 16GB RAM).