Install the destop version and if you've made a mistake do the following:
1. Go to preferences, account and unlike the computer
2. Log in again
3. Pick "Advanced"
4. Pick "I want to choose where to put the mediafire folder"
5. Now pick "Other" (I have "0-CLOUD" option)
6. Select "Sync all folders in my mediafire account"
This will install the "Mediafire folder inside the 0-CLOUD folder
Step 1: Record
Step 2: Connect and auto convert (use Photo gallery) [File is automatically saved here: Libraries > Videos > My Videos]
Step 3: Make a spare copy of the file in case the original is damaged.
Step 4. Open Freemake Video Converter.
Step 5. Click “video” and open the COPY (not original) file.
Step 6. Start a project (click the icon next to the video and open it). Click the beginning and ending "scissors" icons to select portion you DON'T want.
Step 7. Now that the selection has been done, use the scissors icon in the middle to clip out the unwanted section. Repeat for any other image you don’t want.
Step 8. Click OK. This will lead to the main menu.
Step 9. Click MP4 and convert. It will save to: C:\mymessage\xxx.mp4
Step 10. Upload to youtube. On Youtube you can further edit (e.g. cut out the ‘freemake section that comes up in the end)
Paint.net asked me to upgrade to a new version which I did (version 4. something), but then it stopped working (on 64 bit Windows 7).
After wasting time on the internet I found an older version 3.5.10 which I'm providing below for anyone who can't find it (and for my later use).