Jass

You can upload a file at a time in Download Manager free.
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Follow the steps to customize

You need to copy the tpls dir from download manager plugin dir to active theme dir.
Them rename it copied tplsdir ( which is in your theme dir ) to download-manager
Now edit wpdm-all-downloads.php in download-manager dir ( which is in your active theme dir )

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[wpdm_frontend] short-code only allows users ( even the admin ) manage their own files only, to edit/moderate others files admin need to do it from admin side

Try this
[wpdm_category id="category_name" operator="IN" order_by="title" order="asc" item_per_page="10" template="link-template-panel"]

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This problem is related to your server, please give me temporary wp-admin login info in a private reply to check it in details
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Sorry, that is not possible as it is now. However you may use our customization team to create such a custom short-code for you, in that case you need to mail to customize@wpdownloadmanager.com for quote.
Thank you.

That is not possible as it is now. However you may use our customization team to create such a custom short-code for you, in that case you need to mail to customize@wpdownloadmanager.com for quote
Thank you.

Please provide your temporary login information using private replay to check the issue.

Please use following short-code to get the Responsive Table output:
[wpdm-all-packages items_per_page=10 jstable=1]

To modify the view you need to do the following:
1) Copy tpls dir folder from download-manager plugin to your active theme dir
2) Rename the copied tplsfolder in your active theme to download-manager
3) finally, To you can modify the output of the table by editing
[active-theme-dir]/download-manager/wpdm-all-downloads.php

Please provide url and temporary login information using private replay to check the issue.