Follow the link below and download the bin file under the "Join Anytime - Connect & Reconnect" folder.
https://drive.google.com/drive/folders/1EOg4jOEEX9Pp5cllywJy_KA2ixBw13PY?usp=sharing

HOW TO INSTALL:
1. In your installation folder*, create a folder called "mods".
2. Drag the downloaded bin file into the mods folder.

Your installation folder on GOG is usually "C:\GOG Games" but this isn't always the case. You may have installed the game in a different folder.