fumblesredeye, I looked at your game file. The problem is action limits. You are taking a Land action and already had used 3 air units for your port strike. They are sitting in Konigsberg disorganized. You only get four air missions in a Land action. See RAC Section 10.1 - Action Types.
The action choice is a key ingredient in WiF and requires careful planning. Another thing you could have done is used your Offensive Chit and taken what in WiF-slang is called a "Super-Combined" for your action. See RAC Section 16.
BTW normally you would not do ground strikes one at a time. You'd fly all the planes - up to your action limit - and then resolve interceptions etc. and then finally conduct the bombings.
Also, I used your file, successfully ground struck the 6-4 Russki that was out of supply with the 5-factor Stuka. I clicked "OK" on the Ground Strike results form and then the return to base sub-step came up and I returned the Stuka, then the green phase button came on. Screen shot is below. I next clicked the end phase and the game progressed to Rail Movement.
Note the small window in the upper left. That shows all the ground striking planes that needed to return to base. They can be returned by selecting them in that window or they can be selected from over top the enemy that they ground struck. Perhaps that window is opening somewhere hidden from you in your screen layout and that's why you think the game is frozen. As I said, even if you don't see the window, you should be able to find your ground strikers on the map and return them.
If the game appears frozen always check the white box two lines down from the flag showing who's active - plus the title bar on the main form - they can tell you what the game thinks it needs to do next.
