do you have ThundR’s mod in your folder, if you read in my release post I have said you need his mod to be able to color the shop.
235 days ago(+1)
you have really early version of ThundR’s mod, you should have 1.0.0.7, by looking at your picture you have an old version, try downloading his newest version and a new savegame and then let me know what you find.
do you have both the most up to date mods, I have no issues coloring my shop, I even tried it last night incase the update broke it and it’s just fine, so something is going on with your mods. Make sure both mods are up to the current version and make sure you don’t have an old design kit in your mods folder as that will conflict with the newer versions.