Changes:
- Additive database format compatible with CAD Decor.
 - Smaller additive base structure (faster loading of bases).
 - Optimization of surface operations (faster rebuilding of walls and tiles).
 - The window sills are now drawn as a full 3D object.
 
Corrected:
- Improved side plinths on corner cabinets.
 - Fixed bug of restoring deleted wall with doors and windows.
 - Fixed bug with incorrect sill fit, with different wall thickness.
 - Improved depth of window insertion.
 - Improved checksum checking of files in cache (allows retrieving corrupted peaks after application restart).