Every game I have started has ended the same way: I send my Caravel back to the New World and click the exit button at the bottom right hand of the Europe screen. It does not happen every time I exit the Europe screen in this way, but once is all it takes. From there on out my units will never cycle, meaning even when the unit is out of movement points it remains selected, even when I skip the unit's turn it remains selected, even when I tell the unit to Sentry, Sleep, Explore, or Go To it remains selected after executing the order. I am able to select other units with a left click and go into any other screen freely, but when a unit is finished for the turn I have to manually click another. Therefore I only can move the units I remember to move instead of having the game prompt me to, like it is supposed to. When a unit executes an order and I manually select another unit it is removed from the queue, meaning if I have three units, forfity one of them, then select one of the other two, I can keep pressing "w" to cycle between the active two without the fortified one popping in. When this happens units also cannot be deleted. Clicking the delete button makes the sound and shows the depressing animation, but does . .. .. .. . all. The delete hotkey is non-functional as well. Similarly, the Clear Specialty button and hotkeys cease function. However, build settlement and join settlement work as expected. As a result of units being unable to end their turns automatically after executing fortify, explore, etc., when you move the final unit of your turn the end of turn button remains green instead of turning red, which is the usual signal to the player that he has no units left to move.