Hi
After update from jD3.9.8.6 to 4.0.4 it leaves several of the old (jd3.9) database tables with _39old added.
Specifically jdownloads_categories_39old, jdownloads_fies_39old, jdownloads_licenses_39old, jdownloads_logs_39old and
jdownloads_templates_39old.
Colin