Select the desired directory and open the Convert files and file details to lower case [Change file names and file entries to lower case] dialog box. If the window Save open projects beforehand? (recommended) [Save opened projects before? (recommended)] appears, confirm with OK.

Change the directory to be scanned if desired.

Change file names and file entries to lower case

Create backup copies of the project files [Create backups from project files]: Optionally, you can create backup copies of the affected project files.

Store original directory name in dir.def translation file [Put original directory name in dir.def translation file]: If you activate this option, the capitalized entries are transferred to the corresponding language file before they are adapted to lower case as directory names.