Squiroll version 1.4 or higher (https://github.com/Dazegambler/squiroll/releases/latest); Radmin for connections that can't work with Squiroll (https://www.radmin-vpn.com/).
Setting Squiroll: Download "stable" version and extract it into your game's folder (th115r, Netcode.dll and th155 need to be in the same folder with everything else in it), run th155r and you should see "squiroll version 1.4" on the top bar and on your main menu. If at any point something breaks or doesn't download, disable antivirus on your browser and windows defender to allow it to get downloaded/ use it on your pc.