Leap Office is not working with Windows 10 64bit. I've tried to find the documents with the compatibility information but failed, since not even the official website was found. I've also checked
Other users have tried to launch the program as well on Windows 10 but failed since it fully lacks compatibility with this particular version of Windows.
However, if you have the setup package, right click it and choose Properties > Compatibility. Choose another version of Windows from the list and then run it.