Just downloaded UnityHub (version? I don't know ... maybe add a little Version info somewhere hint, hint ) and 2018.1.0b4. I had opened a project using said beta and closed it. Now I though I'll open the project again but this time using Unity Hub. I have these two Unity versions in Hub: I try to open this project (never mind the drawing ... I slipped ): Pops up this message: I suppose it's trying to look for 2018.1.0b4 but it's only comparing it with 2018.1.0.13845 or vice versa.