Hi, could you please send me the content of USERPROFILE\AppData\LocalLow\Imagined Reality\Stellar Sovereigns folder to stellarsovereigns@outlook.com
The first crash, did it happened during turn execution?
After sending me I suggest to clear the content of that folder and try the game again, first without a reinstall then after reinstall.
*NOTE: AppData is a hidden folder, so you may have to thick the Hidden Items option under the View tab of your File Explorer