Obsidian has released a hotfix for NWN2 that fixes a toolset crash with 1.03:
We have released a hotfix for version 1.03. Running the Autoupdater will update you to the a new version - while the main version number shown in the launcher will still be 1.03, the full hotfixed version will read as 1.03.840 when you run the auto-updater. The non-hotfixed version will read 1.03.835.
This hotfix is being released to fix the toolset crashing on launch for users whose Windows language settings were not English (United States).
The 1.03 patches for other languages are still undergoing finalization and will incorporate this hotfix when they are released.