Great answer. Thanks. Fingers crossed!

the information thank you ! I will try that.

Copy the files C:\Program Files\3DCoat-2025\data\ToolsPresets\InstallAppLinks following this instruction https://3dcoat.com/forum/index.php?/topic/27879-blender-applink-installation-walkthrough-ctc_nick/

No, it's not. Flatpak is the way. I was skeptical for a while, but I don't think this is going to work any other way. Hopefully Sergyi following SreckoM initiative will solve it once and for all.

now, I installed 3D-coat V2025.15 ,but automatically blender addon install program don't execute. 

I installed Blender5.0, I can't find 3d-coat addon in blender preferences.   coataddon.mp4    

Im not that Linux savvy. That being said, after downloading and execute the 3dcoat file there was a python 3.10 lib file missing. Ive used these steps sudo add-apt-repository ppa:deadsnakes/ppa sudo apt install python3.10 # venv is essential for sanity. sudo apt install python3.10-venv # this installs libpython3.10.so sudo apt install python3.10-dev  From here Got another library missing error: ./3dcoat: error while loading shared libraries: libgtk-x11-2.0.so.0: cannot open shared object file: No such file or directory Installed it with  sudo apt-get install --reinstall libgtk2.0-0 From here And used Ubuntu 24.04 terminal within DistroShelf to perform the steps mentioned above because Bazzite is my daily driver. I can launch 2025.15, so it worked. But, is this the way? 

@ЯрославPlease describe your workflow. Exporting the sculpted object to .fbx showed no errors.