The problem has been solved. All I had to do is to update to the latest version of JDK 9.0.1 64-bit.
I am running Windows 10 Pro 64-bit 1709 build 16299.19 (Fall Creators Update). I wanted to try Freeplane so I downloaded and installed 1.6.10 version of the software. I tried to follow instructions to make it run but it did not work. Is auto.properties is a name of the file? Is there any extensions? II placed this file in "D:\Program Files\Freeplane\auto.properties". Is this the right place? Please help me.