I DLed GIMP 2.99 but nothing seems to happen when I tried to upgrade from 2.10

Hi. Working on some photo retouching i found usefull to clone some details from other pictures, elements from background, textures, etc. Usually i navigate that stored photos trough some external program, like could be xnview. Would be interesting be able to "clone" from any portion of the screens you have, instead to open the file in Gimp.
just saying...

Hi!. Im having issues with the option "expand layer" activated with clone, and maybe others. Anyone?
Two questions: how i report a Bug properly? 
and... there is some way to recover not saved works?
I save always but, since i had some unexpecteded crash too offenly, i wonder that myself.

Greetings. 

For a very long time, I used GIMP 2.10.2. The program worked very ok for my needs but needed to migrate to 3.0.2

The issue here is the fact, I use a lot "Exchange color" feature from Color tab. When I have a selected square from whole picture, I try to use this feature on GIMP v3.0.2. 
First time color has been selected to change, it nothing happens.

I try a second time to select a new color to be used and program crashes. Very frustrating.
This behavior does not happen at all in GIMP 2.10.2. At the very least, it takes some seconds to "load" and new color is assigned.

I'd appreciate your help to fix this crash, in case it exists. Video recorded is on link below. Thanks in advance

2025-10-18 14-48-03.mkv

What the title says. What is going wrong here (I have attached a link and image). All I want is the fill the circle selection and GIMP isn't doing that. Is it GIMP acting up or is there some hidden option that is buried under the seventh level of hell? /s

PS: It does the same thing when I select Fill Whole Selection.

https://imgur.com/a/Mba4ThE

Can anyone guide me to a video, link or post that explains how to edit and create mask for astrophotography images?

Is possible to apply a given filter as brush? I mean, while you are painting over, aplying it as if you were selecting what the brush paint. I saw that in a windows program called "Foto sketcher" that allow you to manually apply the effect while you are painting, i thought it was a brilliant idea, but with any filter.
Maybe something like that is possible, and im not aware.

Hello!
I had Resynthesizer, but it started showing errors, so I uninstalled it. I had installed it through the Zorin app store, but after uninstalling it, it no longer appears there. How can I install the plugin?
I use Linux Zorin and Gimp 3.0.6
Thanks

Trying to install Resynthesizer (v3) for GIMP 3.0.6. I haven’t been able to get it working, even though it does install on my system. See the screenshots — they show the error messages GIMP gives. I’ve installed the plugin into GIMP exactly according to the instructions: https://www.youtube.com/watch?v=FCi_S14jBYM.

I've tried Googling and searching around, but haven’t found a solution. Maybe someone here has some advice? I’d be really grateful.

I'll include the text of the error messages here in case it's hard to read them from the screenshots:
GIMP notification: 'Plug-in Heal Selection... left image undo in inconsistent state, closing open undo groups.'
And another one: 'Execution error for procedure “Heal Selection…” — Error: eval: unbound variable: plug-in-resynthesizer.


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I'm aware that it's possible to open Darktable through GIMP when trying to open an image in raw format, but I don't know how. I went to Artificial Intelligence and came up with the idea of creating a .sh file that calls Darktable and inserting it into the plugin section, then creating a link in Edit > Preferences > Image Import and Export. But I don't know how to do this or if it's correct. So, can anyone tell me how I can do this?

I use Linux Zorin OS

Thanks