My 4K Downloader quit on me. It just kept showing the word Error with a red triangle by it. I tried different videos, restarting 4K, restarting my computer. The other downloaders on my system where working so it was a 4K issue. I clikced on Help on the top menu and clicked on Support.
This automattically opened my email program, Thunderbird with an email ready to send. So I described my problem to them and attached the following screenshot.
If you don't go through their app, send an email to support@4kdownload.com. Include screenshots of problem and Smart Mode settings, application version (go to Help then About), and operating system. This is my information that was automatically sent in by the program:
Application Name: 4K Video Downloader
Application Version: 4.18.5.4570
Operating System: windows-64
Today I got an email back suggesting I log into Youtube with the program, never had to do it before but decided to give it a shot anyway. I'm using the paid version here so I don't know if this applies to the free version.
To sign into YouTube, open up the progran and then click on Tools in the top menu then click on Preferences...
Then look towards the bottom section called YouTube (of all things :-)). Right now I'm already logged in but if I wasn't the button would say Log In, just click on it.
You'll then get a pop-up box from Google to sign in. Put in your email then Next and password. It will then go back to your preferences page and like in my example it will show you as signed in.
Under the Log Out/In button you maty notice a little note, Google recognizes this application as an Apple iPad. And that is true because I got a New device security alert from Google saying it was just signed in with a Mac device.
So I clciked on the Check activity button in the email, which took me to a page where Google wanted to know if it was me or not. I clicked on the button to say Yes it was me, and everybody seems to be content. And my downloader is working again.