The folder with the main applications is the one chosen during the installation procedure. Starting from the version 2.3 there are no subdirectories used and all files being the system components or accompanying applications are in the same directory. Some of the accompanying applications may create in this directory their own temporary files. See the chapter on the Vital files of the system for more details.
IMPORTANT NOTE: In the Windows XP environment a user of has to have rights to access or modify the content of the Laplace system installation directory (usually: …Program Files/Laplace system/). The program creates there some temporary files and without a possibility to access them it will not function properly. Thus for the current version of the program a user has to have an administrator rights on this particular computer or an administrator has to give a user rights to access the Laplace system installation directory.