So after I launch the game a total of 4 files always go missing. 1 after only the launcher which seems to be the largest of 18~mb the 4 files total are 19mb.
I have an entire SSD dedicated to steam and excluded from my security software (ESET). Though I have tried installing it on other disks with same results.
This is the only game I have that has this issue.
From what I see that happens is the Terran ship style disappears from selection and under ship designing no matter the style I select hull and visual options are gone. Though not weapons or engines etc. which I found out after trying to edit standard ships.
I also have quite heavy stutters on end turns which I never had till after the DLC dropped.
System: Windows 10 Pro 64-bit i7 6700k 32GB DDR4 2400Mhz ASUS GTX1080Ti 4 SSD's 2 HDD's BeQuiet 1000W gold ASUS TUF Sabertooth Z170 S
Some things I tried. Manual purge of registry entries with the game. Excluding game folder and entire disk separately. Disabled security then launch. Reinstalled at least 7 times across different disks. Unsubbed and removed all traces of steam mods.