I just installed the planetary base system mod (correctly I hope) and reloaded the game and I got to the start screen, and I clicked on start and now it is frozen on the page with start game option, settings option, etc. the graphics in the background are still working but when I go to click on start game (or anything else) it does nothing. I have no idea what is wrong. I (think) I installed the mod correctly. What may I have done wrong? thank you, in advance.