I'm trying to use Ctrl P to Edit all layers in external editor via Photoshop but all i get is the cannot write file error. I'm using version 4.8.18. Windows 10. It says its up to date.
Same thing happens if i open as Admin.
Try to relocate 3D-Coat's data to some other folder. Create the file
3D-Coat-install-folder\coat_data_path.txt
and put there the path to data folder, for example
c:\3dcoat_data\