Hi, I'm new to unity and modelling in general, my wish is to modify an existing modded IVA for personnal use. I was adviced I needed KSPparttools for that (aalthough, I'm not sure ? since I'm not creating an actual part ?) So anayway, I followed JPLRepo post and instructions : Download Unity 2019.4.18f1 and run it. Then open your Mod project, upgrade it to Unity 2019.4.18f1. Uninstall the built-in Unity TMPro package from Unity 2019.4.18f1 - Go to Window - Package M