Thanks very much for helping me out Tig,
Unfortunately I followed all your instruction, turned everything off and restarted, Still have the same issue.
Sorry.
Graham

Thanks for your help, however i have tried all that.
When I start Sketchup the first notice on screen is
"Installation of Fredo6_Curviloft is probably incorrect. Subfolder is missing."

I press OK and then get the same message for FredoTools; JointPushPull and
"Script ToolsOnSurface is loaded but menus will show up only at next startup of Sketchup."

So I start the program again and exactly the same messages occur.

Tried the autp-install again and got the same message again = "UnZip Error: Could not unzip archive."

I'm running 2020 version of Sketchup.
Cheers
Graham

Tried that, then tried to load Roundcorners and got this result:
UnZip Error: Could not unzip archive.

What next???

Have used your plugins for years. Now I can't load them.
Installation of Fredo6_Curiloft; Freddo6_FredoTools; Freddo6_Joint PushPull;
Subfolder missing.
Tried to install roundcorners from extension manager but it failed.

Tried to install LibFredo6 11.8a. received error message:
“undefined method ‘loadRBS’ for SCF:Module

Any advice on what I should do.