Hello Fredo,
I'll stick to the win 8.1 machine because less chance I messed something up with whatever....
Yes, all three
I tested that too: with pre-selection, without pre-selection.
Maybe it's my model: I tried with very basic shapes, no problems. But I dont think my shape is that compliclated. I recall having skinned more complex models. Anyway, maybe I'm overlooking something. I'll include my model.
Many thanks for having a look.
Bekans
Yes,that's what I did: all up to date versions auto-installed via the plugin store, no moving or copying. Same procedure for each machine separately. On the new win 8.1 machine everything has been installed for the first time. Besides Total Commander it's only application 
Hello everyone,
I'm sure I've been using curviloft in a previous version whithout any problems, without software problems anyway
On a win7 system I run Sketchup 8 en Make 2014.
On a win xp system I run Sketchup 8.
On a new win 8.1 system I have Make 2014 freshly installed.
All have updated plugins(fredo)installed via plugin store.
Now,every time I try to use any tool the progressbar freezes after computing the selected edges.
Same behaviour for all three machines....even with simple shapes with less than 100 edges.
After quiting the plugin and reactivating it the frozen progressbar appears without showing the plugin menu.
I've also disabled all plugins except fredos' to exclude possible plugin conflicts.
Anyone any clue?
Thanks
Bekans