hello i have the same problem after upgrading to version 5.1.14.
use [wpdm_all_packages items_per_page="10" categories="schede tecniche" jstable=1 order_by="title" order="DESC" cols="title|excerpt|package_size|download_link" colheads="Titolo::250px|Descrizione|Dimensione::50px|Visualizza / Scarica::100px"]
now I had to downgrade to version 5.0.94
Otherwise the links to the files will not work.
Please help me