Wouldn't it be easier NOT to use hidden files, and to include all the files in the same directory? It would make life much simpler.

I didn't created .eteks directory for fun. I simply respected Linux practices where a directory starting by a dot stored in the home directory of a user is the common place for the preferences of an application. If you didn't copy any of these directories, I guess you may have lost the preferences of most of your software. [:(]

Note also that I chose to store imported models in this directory to simplify the tasks of users who upgrades their version of Sweet Home 3D while keeping their imported models. If these models were stored in Sweet Home 3D installation directory, users would have to copy these files each time they install a new version of Sweet Home 3D, and many of them would complain they lost their imported models during an upgrade.