I had the same problem after upgrade from 2.0.5 to 2.3.1, in my case problem was an issue database upgrade, check that in your new database table `download_available` has column `DELETED` if not then execute statement:
ALTER TABLE `download_available` ADD `DELETED` INT(1) NOT NULL DEFAULT '0' AFTER `ID_WK`;
this statment is in /...path../ocsreports/files/update/7011.sql, after that update new versions of packages are visible on the list.
ALTER TABLE `download_available` ADD `DELETED` INT(1) NOT NULL DEFAULT '0' AFTER `ID_WK`;
this statment is in /...path../ocsreports/files/update/7011.sql, after that update new versions of packages are visible on the list.