In version 1.1.0 I have moved the landing page from the general options to the upload download form. This now gives you the ability to assign a different landing page to each individual download.
The plugin will continue to use your old options until you select a landing page, so there is no need to immediately make any changes.
To assign a landing page to a download you already have set up, just click "Edit" in the download list, assign your landing page and save it.
We have noticed one problem. when updating from a previous version the plugin tables are not always updating. If you assign a page to your download and it does not show in the table, just deactivate the plugin, count to 5, then reactivate the plugin. It will update and life will be good.