Hi Joris...
once again, it is NOT a temporary file, contrary to what the documention says...
For a windev install it's a wDf file, and for a webdev install, it's a wWf file (hence the wXf named used generically)
To create one, open ANY project, and setup the install... As you choose options, they will be written in the file in question, and you will find the projectName.wDf if it's a windev project or the ProjectName.wWf if it's a webdev project in the project directory
Best regards