Just open the converter
Filename - Tag and use
%artist% - %title%
as format string.
Please see How do I change upper/lower case of tag-fields or filenames? for the next step 
Best regards,
~ Florian
Just open the converter
Filename - Tag and use
%artist% - %title%
as format string.
Please see How do I change upper/lower case of tag-fields or filenames? for the next step 
Best regards,
~ Florian