If you lose your data after applying the last patch, please calm down and follow this guide. It will help you retrieve it.
1. Update your game to the latest version and enter the game. If this cannot help, then go to the next step
2. Copy the following directory and paste it into any document browser
%USERPROFILE%/AppData/LocalLow/EmpromGame/Bioweaver/
3. Put the savedata folder inside the folder with numbers;
4. Launch the game and your data will be safe
Guide to retrieve you saved data
Source: Steam Community (opens in a new tab)