The max file size for uploads is 128 MB. If you have a large PDF, in Acrobat Pro, use the Reduce File Size function first. Or go to Adobe Compress PDF website.
Click on Clear Cache at top right after making changes in the Smart Slider, Ninja Tables and some pages with special plugins. Otherwise your users won’t see changes immediately due to server caching. If you forget, changes will appear in an hour.
Items trash in Media Library will be permanently deleted in 30 days. Ninja Tables do not get stored in the trash, so please be careful about deleting them.