Ah, sorry I missed that you said you have tried to reinstall already. If you reinstalled with the latest download from your Spine license page, then it should not show that dialog anymore. I tested this again just now and it's working correctly.
Could it be that you aren't reinstalling the latest? If you are on Windows you should see HTTPS をサポートしていないため、画像は非表示になっています。 | まだ表示するSpine Launcher 3.8.81
in the title bar during installation:
Also when you run Spine, your spine.log
should start with:
Spine Launcher 3.8.81
Esoteric Software LLC (C) 2013-2020 | http://esotericsoftware.com
...
You can find your spine.log
here:
Windows: <user home folder>\Spine\spine.log
Mac: <user home folder>/Library/Application Support/Spine/spine.log
Linux: <user home folder>/.spine/spine.log