You can also download game at Indie DB page
This is also where you can download older versions
Please make sure to not place game folder in write protected location such as "C:/Program Files".
In case windows complains about not being able to run the game due to some missing .dll files, you'll need to install Microsoft Visual Studio x64 redistributable. You almost certainly have this already installed by some other game or program. You'll also need to install this if you're trying to run Soil through Wine on Linux or something, unless some other program or game already installed it there.
I am able to run Soil with Wine on old notebook on Ubuntu, so I assume there should be no problems. If you have some problems running with Wine, please let me know, and I'll do my best to make it compatible (mail, discord, etc.). I understand that having a native build would be more convenient, but I can't really spare time porting it, and making multiplayer work across different builds would be extra fun.