To reproduce: start a game with ESG and a balanced galaxy shape, exit the game. Disable ESG then start a new game without changing the galaxy size slider. The game will get stuck during the "Launching Game" phase of loading. It'll fix itself once you change the galaxy slider.
May or may not be fixable, given it's caused by unloading the mod, but worth noting as an issue to help people troubleshoot.
To reproduce: start a game with ESG and a balanced galaxy shape, exit the game. Disable ESG then start a new game without changing the galaxy size slider. The game will get stuck during the "Launching Game" phase of loading. It'll fix itself once you change the galaxy slider.
May or may not be fixable, given it's caused by unloading the mod, but worth noting as an issue to help people troubleshoot.