Widescreen support was the main change in the download version (also on GOG, as well as Impulse).

Originally Posted by ForkTong
Graphics are not updated or improved or changed or touched smile Only code has changed. You can play it at higher resolutions now. List of updates:

General:
- Feature: Allow more resolutions
- Feature: Recreated config tool
- Fixed: numerous crashes and freezes
- Fixed: encumbrance could make items disappear
- Feature: Tooltips of damage stats on stat screen improved

Skills
- Fixed: Spellbooks no longer ignore level requirements
- Fixed: All weapon expertise skills give percentile bonuses instead of static bonuses
- Fixed: True Sight damage is now actually used
- Fixed: Bow and crossbow expertise bonuses are now actually used
- Fixed: Divine Eye removes the fog of war
- Fixed: Deadly Gift's Scorpion Trap is less powerful
- Fixed: Resurrected enemies die after region swap