In order to join two songs, download and install the latest version of the Audio Cutter Joiner software. After that, launch the program and read the instructions that you can find in the first window:
If you have issues, you can try using other similar utilities from the database of Software Informer. All these tools come with a user guide that will help you merge the files. You should find the guide in the Help menu or in the installation directory.
For example you can use Shuangs Audio Joiner. All you need to do after install and launch the program is to add the songs you want to join using the icon and then to press . Select an output format, click Next, and follow the on-screen instructions: