When you add a BoM on drawing list on an Advance Steel drawing, AS can read the BoM templates from two places, based on the status of the default : "Use the new BOM on drawing" (found in GAM / Defaults / Drawing - General).
When the default is checked (which should come as default from the installation), then AS will display the BoM lists found in the following path : C:\ProgramData\Graitec\Advance Steel\2013\Shared\Support\BOMTemplates. Please check if in this path you have the lists. If not, then run an Advance Steel reinstallation.
When the default is unchecked, then AS will insert a BoM list from the BOM Editor, and will use a list from the User branch if the category "Drawing" is present in your user database (AstorAddIn.mdb).