Special characters in path prevent loading of application

Mind the following restriction when installing Neuron Power Engineer and creating new projects: 

No blanks or special characters in project name and installation path

Make sure that there are no blanks or special characters (such as umlauts, e.g. ä, ö, ü) in a project path/name and in the installation path. If anyway, Neuron Power Engineer will not be able to load the application onto the PLC.
For the paths and project names, letters A – Z or a – z, numbers 0 – 9, dots (character .), underlines (character _) and dashes (character -) are allowed. Examples for allowed project names: my.project, my-project, my_Project_01

More useful information: Disabled button "Build and Load Application"

Workaround: Substitute a path that contains invalid characters by using the command subst of the operating system. This command associates a new (virtual) drive A - Z to the path. Contact your administrator, if you need help on using the command subst.

Example for the commands 
subst w: C:\Users\JoXSchäfer\logi.cals\NeuronPowerEngineer\workspace
  (* Associates the virtual drive w: to the physical workspace folder containing the umlaut "ä". *)
subst p: c:\Users\JoXSchäfer\MyProjects
 (* Associates the virtual drive p: to the physical project folder containing the umlaut "ä". *)

Then use these virtual drives for the workspace when starting Neuron Power Engineer and when creating new projects.