The new version (2.0).
The new version adds many new features.
1 - The "Search" panel. By the name you can find the necessary organs, vessels and so on.
2 - The "File" panel. Here you can save the state of the program to a file. You can to save some view to file, and then can to open it.
3 - In the left panel we change most of the text buttons to the graphics buttons, which improved the perception of the interface.
4 - Selecting objects much faster. When you hover over objects immediately pops up the name of the object under the cursor.