Toolbar not loading?

I’ve used ScriptComplier in R7 to create a .yak package for R8 and got it all uploaded. It’s available on packagemanager and the plugin is working fine. But for some reason the toolbar doesn’t load automatically. Is there something I’m supposed to do to get it to load automatically? I can see that the toolbar did download into the correct folder in windows, but Rhino doesn’t automatically load it.

PetersTools v3.2.5

I tried restarting Rhino, restarting my computer, uninstalling & reinstalling the plugin.