[Error "The file was corrupted or was saved in a newer version of the program".]

The file contains a pdn3 image
  PDN3ºÿ<pdnImage width="6000" height="4000" layers="21" savedWithVersion="5.2.8451.6614"><custom>
but somehow it's corrupt. The error message tells that the deserialization detects the chunk 0 twice.
As I remember, Rick posted a while ago a way to extract as much as possible from a corrupt file via cmdline. So you may try this.
Hope someone else could find the link to Rick's post.

[There was an error opening this file]

This file contains just zero bytes. So there is no chance to restore the image.

[There was an error opening this file]

Sorry it looks like that the file is corrupted. If the file is family-friendly you may attach it so that we can take a look.
@midora In the 'not identify' case dump the first and last bytes of the file.

[There was an error opening this file]

1 hour ago, Pixey said:

 

I didn't know if this was working again.  Thanks for reminding me  

 

Thanks to Rick, who added a patch. So it's working again in paint.net 5 until an updated version of the plugin will be released.

[There was an error opening this file]

There is also the What's It?' Tools Effect Plugin to verify and rename according to the results.

[Stadium shape]

Thanks but as I said before I'm asking for a built-in solution which you can handle like drawing a circle.

[Stadium shape]

For sure, that's one of the ways to create a stadium shape, the disadvantage of this way is that you always have to calculate and adapt the corner size.

[Stadium shape]

Quiet often I'm using a stadium shape (there are several other names like pill shape)

Maybe an additional option could be added to the ellipse shape to add a length for the parallel lines between the half-circles (or also half-ellipses).
Or a complete separate shape which only allows half-circles and stretches the parallel lines.
For me this shape is so basic that I would prefer not to use a plugin.

[Add an animated gif, add other elements, and save as animated gif?]

The support of animated GIFs is not part of the paint.net installation. You have to install a filetype plugin.
'GIF Animations and Images' FileType Plugin (.GIF, .AGIF)

[Rendering Benchmark]

I'm thinking about whether or not it makes sense to write a rendering benchmark plugin for paint.net.
Or should this be a built-in feature, because you can provide the result together with the
I know there are a lot of things which could influence the result, but to get an idea about the performance between different systems would be interesting (at least for me 😉
The history panel could also show the execution time of a command.

[Touch gestures]

Tochpad works ok for me too. Touch gesture does nothing (even if the mouse pointer is on the image).
Does Surface use the center of the touch gesture as center of the zoom? That would be the idea..
I'm still using the old gesture handler to support this (which delivers the zoom point) in my apps.

This touch gesture works in Firefox well.
Windows11.

[Touch gestures]

Would it be possible to support the zoom touch gesture?
Two finger drag of the canvas works (but maybe just because the system simulates slider changes).

[Layer Panel]

                                                                                         👍

[Layer Panel]

'Call Out' would be great for the layer thumb. Or a general zoom panel which could magnify layer thumb or image at the mouse position.
I hope that Rick can spend some time in the future to extend the pdn file format to allow layer groups and other layer specific infos (comments, channels, ... 😉

[Auto exposure]

Please post a screen shot of the paint.net 'posure' plugin you are talking about (if you are talking about something related to paint.net).

 

Typically you can do this kind of manipulation only by knowing specific information of the camera hardware and using raw data files from the camera. Adobe LightRoom can do this.

[Suggestion: F2 to rename layer]

F4

[Plugin that splits objects on transparent PNG into individual layers]

If you have to handle 1000 images then paint.net is not the right tool to do it. The picture you posted can be tiled during save to individual images using the ZIP Archive FileType Plugin.
 

[Plugin that splits objects on transparent PNG into individual layers]

You may use 'ZIP Archive' FileType Plugin to create tiles from the image and save them in a zip file. You can unzip and import them via Layer/Import From File

[Hotkeys are only supported by the English keyboard layout]

It's somewhere in the development area but it has to be included in paint.net.

[Hotkeys are only supported by the English keyboard layout]

Yeah, this is a long term issue for some of us. Some time ago I provided code how this could be solved. Works fine in my own applications.

[PDN 5.0 Color Oddities]

Or maybe something related to "Apply Embedded Color Profile"?

[why are dithering level and trancparency tresholod disabled when saving as png?]

Please update to 4.3.12 or try the 5.0 beta, there is no support for older version on this forum.
Anyway, settings for dithering level and transparency threshold are only used if you like to save your image with 256 colors (8-bit) or less. They map the 32-bit color values used in paint.net to a reduced set of colors. If you switch bit depth to 8-bit or less then these settings will be enabled.

[What is the right way to use Winforms inside an effect plugin?]

Your are developing a plugin and not an application.

 

Derive you effect plugin from PaintDotNet.Effects.Effect and override CreateConfigDialog.

There you should return a new dialog derived from EffectConfigDialog.

This is the dialog you can populate with your own controls.

 

[Paint.net ate my project]

I would use the 'What's It?' Tools Effect Plugin to check if you saved the file in format different by mistake but used the file extension .pdn.

[Has the export layers plugin been reinstated?]

To export layers use the 'ZIP Archive' FileType Plugin