Not directly, unfortunately.
It's a bit of a hassle in fact. Here's my workaround :
1. Go back to the main page, go to editor, download the HD version of the dronie
2. Click on GO FLY
3. Click on the arrow bottom right
4. Find your dronie, click on the "pencil" to edit it
5. Click on "HD" top middle
Normally steps 4/5 should be enough but for some reason it can't "find" the associated HD file if you don't to step 1.