Doc-Attention

* Attention before using *

Please give attention to the following:

1. At first, you should avoid working with directories containing important data. Please create a directory for testing purposes and check the safety of this program by yourself, before full-scale use.
2. While the program synchronizes, please do not disconnect the WM device. This act is very dangerous. （5 seconds before a synchronization, a warning appears in the main window.)