Thanks for writing. I have tried downloading the module lesson and was able to locate the solution scripts, hello.ave and datetime.ave, in the avenue3d\lesson01 directory.
It is highly probable that the data sets, or just one of the projects, were corrupted during the download process and you need to download the data again. You should delete the current lesson data directory you are using and download the data again. If you still cannot find the solution scripts after re-downloading the data, please let us know. I can sent you the solution scripts via e-mail.
Hope this helps. Let us know if you have more questions.