Random update! Slightly nerfed hard difficulty and added feature to update existing saves to latest balance data.

Also 30% discount that will last for couple of days is planned to start tomorrow!

Full changelog:

Hard and stable hard game modes:
- Enemy damage multiplier per wave: 2.2% -> 2.1%
- Enemy additional stat multiplier per boss wave: 25% -> 22%
- Overall enemy damage multiplier: 125% -> 120%
- Boss damage multiplier: 110% -> 107%
- Health powerup drop chance multiplier: 90% -> 95%
These changes should decrease gap between normal and hard difficulties but still keep hard difficulty *hard*

Third boss:
- Healing powerup (dropped between phases) effect multiplier: 140% -> 145%

Fourth boss:
- Healing powerup (dropped between phases) effect multiplier: 175% -> 180%


- Added feature that allows updating balance data of existing save file to latest version. Button to perform update can be found in saved game "INFO" panel.