Ok, i print some of 3dlabprint planes and i have a issue with slicing the F4U corsair. someparts i have to use version 4.0.0 and some parts of the print i have to use 4.0.1 so you need to have both 4.0.0 and 4.0.1 installed to do the project. (not sure if this is your issue or 3dlabprint?) but someo...