Thank you!!
I reinstalled SketchUp8, and placed all folders into recommended folders and activated "rounded Corners" from Profiles. Now it works!!!
Thank you very much!!!!

Please, HELP!!!

Installed this plugin on MAC OS 10.6.6 - it does not work. I copied all files into plugin folder, installed LibFredo6 (by the instruction provided at the link) - now when SketchUp starts up, it displays "Load Errors":

Error Loading File __loader.rb
uninitialized constant TraductorError Loading File bootstrap_RoundCorner.rb
uninitialized constant RoundCorner::T6Error Loading File Lib6__obsolete.rb
uninitialized constant Traductor::T6Error Loading File Lib6Config.rb
uninitialized constant Traductor::T6Error Loading File Lib6EdgePicker.rb
uninitialized constant Traductor::T6Error Loading File Lib6Input.rb
uninitialized constant Traductor::T6Error Loading File Lib6Operation.rb
uninitialized constant Traductor::T6Error Loading File Lib6Palette.rb
uninitialized constant Traductor::T6Error Loading File Lib6Plugin.rb
uninitialized constant Traductor::T6Error Loading File Lib6Protractor.rb
uninitialized constant Traductor::T6Error Loading File Lib6Selmode.rb
uninitialized constant Traductor::T6Error Loading File Lib6Startup.rb
uninitialized constant Traductor::T6Error Loading File Lib6Tool.rb
uninitialized constant Traductor::T6Error Loading File Lib6Web.rb
uninitialized constant Traductor::T6

(yes, the message looks truncated) and then starts up normally. Of course, there is no "Tools > Fredo6 Collection" menu item.

SketchUp version 8.0.3161. BTW, I copied libraries into Macintosh HD/Library/Application Support/Google SketchUp 8/SketchUp/plugins (not "Google SketchUp 7" as was suggested. Could it be caused by this?..