hi, i have a similar problem but worse, i can only export models when the "only export selected object" box is not ticked.. it will only export the whole model.. when ticked,
it actually produces a file of 0kb in my recent files in explorer but it doesnt appear in the destination..

though i dont understand because i didnt do that before.. i didnt upgrade or anything.. im on sketchup pro 2021, windows 10.

oups thx, so i got the right one, now its showing an error message:

i purchased the license and trying to validate the file, but its returning this dialogue

err.. i have downloaded the round corner plugin, the extension store plugin, but i cant see the license menu..