When you save as a file from Print/Export, Logos pre-fills the the filename for you with the name of the resource. Great!
But it also replaces all the spaces in the filename with underscores. Not great! I understand the need to eliminate invalid characters like the colon, but spaces have been valid on Windows since 1995! It looks horrible, and serves no useful purpose, and my tidy mind 'has' to correct them all (which is fine for Common_Grace, but a real pain for Praying_Backwards__Transform_Your_Prayer_Life_by_Beginning_in_Jesus_Name, or A_Dictionary_of_the_Bible__Including_Biography_Natural_History_Geography_Topography_Archæology_and_Literature.