4K Video Downloader: Please add batch subscribing in via importing from file, as well as exporting all subscriptions to file, like is available in 4K Stogram. Thanks!

Please add the ability to batch add subscriptions via a file in 4K Video Downloader. Also the ability to export to a file. This feature is available in 4K Stogram. This will enable premium users the ability to backup and restore their subscriptions in the case of a system crash.