What is source code?
The software on this site is distributed in it's original source code format, as opposed to executable binary format. This means the programs are not ready to run and must be compiled first. If you are not sure have someone experienced guide you through the process.
Why source code? Logistically it is simpler to distribute, and the end user may choose to inspect or modify the program as necessary.
Build environment
At minimum you will need a C++11 compiler. GCC is a good start. The code on this site may depend on third-party libraries such as libpng. The included Makefiles expect pkgconf and find to be installed. Depending on your operating system, all of the prerequesites could be just one or two command line invocations away.
Compiling
Each package should be relatively straightforward to build:
$ tar xJf wltools.tar.xz $ cd wltools $ make
If all went well, the tool can now be used!
$ ./wltools ../path/to/liero.wlsprt ../path/to/test/ $ ./wltools ../path/to/test/ ../path/to/edited.wlsprt