1.Download UnityAssestsExplorer,Link here:
2.Open Crogram Files/Steam/apps/mysummercar/mysummercar_data/sharedassests3
3. Search for:Store_Banners.tex,then right click and press extract this file.
4. Replace the game's files with mine,and then right click again on Store_Banners.tex.tex and press:Import file from DDS
5.Unity should tell you DONE.
6.Press:Save as assests File,and then replace your original sharedassests3 with the modded one.
7.Enter in the game and play!