Invoking the editor by "awp filename " causes the editor to look for the file
in the directory \Program Files (x86)\Atlantis instead of the current directory.
It is possible to open file only when the full path to the file si specified which is uncomfortable.
Prblem with opening file from the command line
In Windows, there is no such thing as "global current directory". Every application has its own current directory. The current directory in your file manager or another application that you use to launch Atlantis Word Processor, has nothing to do with Atlantis. Yes, you should use full paths for document filenames.