This issue has popped up for a few users here and there. If you're getting this error ("The Date of lib file is error") when you run the Sonix compiler here is a fix.
Most users can download the Foxonix Complete Software bundle, unzip the bundle on their computer, and run the Sonix compiler from the unzipped folder. If you did this but you get the error listed above when you run the compiler, then download the ZIP file attached to this post, which contains the full install program for the compiler. Unzip this on your computer and then run the .exe file. When you run this install script it will install the compiler for you and then you should be able to run it without any problem. When you run the compiler, make sure you're running the new one you just installed (not the old one).
- Will @ foxonix