Fresh install can't write new workflow presets

[jseagull-3sl]

On a fresh install under Blender 4.0.2 (Windows 11), trying to save a workflow preset yields this error:

Error: Python: Traceback (most recent call last):
  File "C:\Users\there\AppData\Roaming\Blender Foundation\Blender\4.0\scripts\addons\Transmogrifier\__init__.py", line 888, in execute
    json_file = Path(bpy.utils.script_paths(subdir="presets/operator/transmogrifier")[0]) / add_preset_name
IndexError: list index out of range

The console agrees that this is not a valid path. However, bpy.utils.script_paths(subdir="presets/operator")[0] does yield a valid path, so I think TM just isn't creating its preset directory on install. My script path array has five entries, if that makes any difference.

[SapwoodStudio]

Hi, @jseagull-3sl 👋 Thank you for reporting the bug. I was able to replicate the issue in Blender 3.6 and 4.0.2 (Windows 10) as well. Your hunch was correct. If there hadn't already been a Transmogrifier operator preset directory created after the User clicked "Copy Assets" from Transmogrifier addon preferences menu, then attempting to add a preset would result in the error you reported.

The bug is now fixed. Now both Add ("+") and Remove ("-") buttons will first create the Transmogrifier operator preset directory if one does not already exist.

[SapwoodStudio]

@jseagull-3sl, in the meantime between now and the next release, you can work around that bug in Transmogrifier v1.5.0 by clicking "Copy Assets to Preferences" in the addon's preferences menu. Then you'll be able to add ("+") your own workflows/Transmogrifier presets as expected.