If you like to have all your Apps DataFolder located as Sub Folder in the XUI.DataFolder here is a working solution:
Example B4J/Windows:
C:\users\<username>\AppData\Roaming\<DeveloperName> as central Folder.
C:\users\<username>\AppData\Roaming\<DeveloperName>\<AppName> as App Data Folder.
And as Result: C:\users\<username>\AppData\Roaming\TechDoc\AppName
Have fun....
Example B4J/Windows:
C:\users\<username>\AppData\Roaming\<DeveloperName> as central Folder.
C:\users\<username>\AppData\Roaming\<DeveloperName>\<AppName> as App Data Folder.
setup the default folder:
XUI.setDefauldFolder("<CentralName>") 'Create central Folder
file.makeDir(xui.Defaultfolder,"<AppName>") ' create Sub Folder
XUI.setDefaultFolder("<CentalName>\<AppName>") 'Update DefaultFolder
And as Result: C:\users\<username>\AppData\Roaming\TechDoc\AppName
Have fun....