Sorry to hear you're running into trouble with version 4.2.43! Here are a few things you can try to get it working:
Check your Spine launcher version
First, make sure you're running the latest Spine launcher. You can do this by going to your Spine license page (from your original purchase email) and downloading/reinstalling Spine fresh. If you've misplaced your license email, you can use the Spine license recovery page to retrieve it.
Try resetting your Spine user files
Corrupted or incompatible settings from a previous installation can sometimes cause crashes on startup. You can reset them by deleting your Spine user files. On macOS, find them at:
~/Library/Application Support/Spine/
On Windows:
%UserProfile%\Spine\
You can find more details on this at Spine Troubleshooting: User files.
Check for software conflicts
On Mac in particular, certain software can conflict with Spine on startup, such as:
- Antivirus software
- Screen mirroring / DisplayLink type software
- Finder enhancements like Default Folder X
- RescueTime
Try closing those kinds of applications before launching Spine.
Also try disconnecting any external monitors and see if that makes a difference.
Run Spine from the command line for more details
If the crash log you attached doesn't give clear clues, running Spine from the command line can sometimes reveal more useful error output:
- macOS: Open
Terminal and type: /Applications/Spine/Spine.app/Contents/MacOS/Spine
- Windows: Open
Command Prompt and type: "C:\Program Files (x86)\Spine\Spine.com"
You can also check the full Spine log file, which is created each time Spine runs:
- macOS:
~/Library/Application Support/Spine/spine.log
- Windows:
%UserProfile%\Spine\spine.log
More troubleshooting tips can be found on the Spine Troubleshooting page.