Changes:

- Add 2 new Music Themes for workshop instead of old ones
- Add new bolts to the parts in steam and electric locomotives

Fixes:

- Rear axle leaf spring - now its on mechanic table not electric
- Fix problem with the sound - now problem with lowing music volume with fast muting is fixed
- Music setting should now been saved with the game
- Improved price showing in the mounting menu
- Game Engine Upgraded to most actual version - improved stability