ok, checking the issue or better if you update to v2.7.0 from here http://www.wpdownloadmanager.com/download/wordpress-download-manager-v2-7-0/ , which will be released in wp.org soon. There no such issue, also you will have many other options.
I have tried updating to 2.7.0 (on test site of course) but downloads list remains empty even I have followed closely instructions using Copy to pro after updating !
Hope you can solve the problem because on this site I have about 120 files available for download.
if possible please send a temporary wp-admin login info in a private reply here http://www.wpdownloadmanager.com/support/forum/download-manager-free/ , so that I can help you with update.
Sorry for late answer but have been away from my desk for a few days.
My client doesn’t want to test new version in case it doesn’t work as expected and old version is rock solid ! My development version has no internet access as I develop using MAMP on my iMac.
May be you could explain in details what I have done wrong ( even I followed instructions provided on your site : uploading new version as well as Copy to Pro and then “Settings” and Migrate)
Thanks for help and apologies for late reply.