Pixey

Why not get rid of all the traces of Paint.NET and then download it again.
 
https://support.microsoft.com/en-us/topic/fix-problems-that-block-programs-from-being-installed-or-removed-cca7d1b6-65a9-3d98-426b-e9f927e1eb4d
 
After running that, then download anew.

I guess tracing/drawing may be the answer and done in stages with layers.
 
This Plugin Shapemaker is very handy for this.
 

   < Clickable.
There also is a neat tutorial for using this plugin.
 

Welcome to the forum @sshrestha  
 
I'm not sure what it is you saw him using, but there is this way:
 
1.  Select the image with the magic wand.
2.  Make a new layer and begin to draw.
 

What's happening is that each time you import the .png it is opening in a new window:
 

 
You need to import via > Layers > import, then the image will stay in the same window.
 
Alternatively, if your smaller image is in window 2, copy it, then move over to window 1 and paste into a new layer.

Hello @Jerpizzaroll and welcome  
 
I think you are looking for this:
 
 
 

Sounds like you have an existing paint.net installation that has become broken. Please use this utility to remove the broken installation:
https://support.microsoft.com/en-us/help/17588/fix-problems-that-block-programs-from-being-installed-or-removed
 
Afterwards, you should be able to install paint.net anew.

There is a site where you can upload the image to see what it is:
 
https://www.myfonts.com/pages/whatthefont
 
h

You would have to have 2 lines with different colors< then use the Dents:
 


 

 

Hello @divad-nebnahtan and welcome to the forum
 
I think you are right, it was possibly Clouds:
 

If you wanted dust - you can use the Noise Plugin.
 

Hello @Stephanoi and welcome to paint.net
 
Perhaps take a look at this Plugin:
 
 

Please try downloading from an offline installer:
 
https://github.com/paintdotnet/release/releases

Hello @baran and welcome
 
Please try this tool first, to clean up bits from the uninstall you did:
 
https://support.microsoft.com/en-us/help/17588/fix-problems-that-block-programs-from-being-installed-or-removed
 
Afterwards, you should be able to install paint.net anew.
 
Also, you can try to download paint.net offline here:
 
https://github.com/paintdotnet/release/releases

Hello @Patapin and welcome to the forum
 
There is a great video by @yellowman on how to accomplish this.  He is using an older version of paint.net, but the method should be the same:
 
 

Make sure to put the transparent image on a new layer, before you flatten.
 

 
Welcome to the forum

Hi @Hedgehog and welcome to the forum
 
Perhaps try this Plugin Image Distortion.
 
I used it to come up with this:
 

Hello @Spore and welcome
 
It sounds like something is broken.  Please try this utility and then try to re-install paint.net again:
 
https://support.microsoft.com/en-us/help/17588/fix-problems-that-block-programs-from-being-installed-or-removed

Hello @Spore and welcome
 
It sounds like something is broken.  Please try this utility and then try to re-install paint.net again:
 
https://support.microsoft.com/en-us/help/17588/fix-problems-that-block-programs-from-being-installed-or-removed

Hello @Spore and welcome
 
It sounds like something is broken.  Please try this utility and then try to re-install paint.net again:
 
https://support.microsoft.com/en-us/help/17588/fix-problems-that-block-programs-from-being-installed-or-removed

Hello @frankuh and welcome to the forum
 
A simple way would be to do this:
 

If you want the blurred part lighter in color, go to Adjustments and use Brightness & Contrast.

Hi @ChrisF and welcome
 
I had a stab at it.
 
1.  Duplicate the picture.
2. Uncheck the duplicate.
3.  On the lower image use the Levels Plugin to get the tree to stand out.
4.  Go to the duplicated image and use the Gradient, set to transparent, and drag over the area by the tree.
 

 
   Tip:  To use the gradient to fade the edge, first use fright click of the mouse to start the gradient, then drag.
 

Hi @ChrisF and welcome
 
I had a stab at it.
 
1.  Duplicate the picture.
2. Uncheck the duplicate.
3.  On the lower image use the Levels Plugin to get the tree to stand out.
4.  Go to the duplicated image and use the Gradient, set to transparent, and drag over the area by the tree.
 

 
   Tip:  To use the gradient to fade the edge, first use fright click of the mouse to start the gradient, then drag.
 

Hell @Claudine Dizy and welcome
 
Sorry, but the rules say we must only speak in English.
 
What we advise in your situation is to download this tool : 
https://support.microsoft.com/en-us/topic/fix-problems-that-block-programs-from-being-installed-or-removed-cca7d1b6-65a9-3d98-426b-e9f927e1eb4d

 
After using the above tool to clean your computer, please try to re-install the program again.
   

Hello @JAGgrafix and Welcome to the forum
 
If you had used out great "Search' option, you would have found this: 
 I will delete your other post, as it was a duplicate of the same question.