The archive (WDSolve-1.0.9-with-ProjectPack1-1.0.0.zip) contains both the main program (WDSolve-1.0.9.msi) and the project package (WDSolveProjectPack1-1.0.0.msi). The main program is a per-machine installation. The project files are installed to the user profile.
The order of installation is not important.
After setup is completed, start WDSolve, load any project (.prj) and click "Run" to validate your copy.
The documentation of WDSolve comes in two parts.
1) The general introduction and user-interface documentation is not yet finished and will be uploaded soon.
2) The technikcal documentation for project developers can be found in chapter 7 of the following doctoral thesis:
http://nbn-resolving.de/urn/resolver.pl?urn=urn:nbn:de:hbz:294-31582
The thesis is written in german.