I have just downloaded the new SU version and am trying to get it up to speed with old extensions. There was one I used called Midpoint (http://www.smustard.com/thanks/Midpoint) which has an .rb file extension. Looks like the new Extension Manager doesn’t like it. Does this mean all old RB extensions are now no longer compatible?
No. Not at all. In fact sketchup still uses RB files but they are normally packed ina file with the extension rbz.
compress the rb file into a ZIP file. Change the extension from .zip to .rbz. Then use Install Extension from the Extension Manager to install it.
I think you must be my own personal Good Angel! Yup, that worked. Thanks again.