I had the same problem. Here's what I did
1. Downloaded Squiggle 3-2 client.exe, not the zip file.
2. Download and install Microsoft .Net 4.0 Web installation (if it is not already installed)
3. Download and install Microsoft Visual C++ 2010 Redistribution package (if it is not already installed)
4. Install Squiggle 3.2 client and open it. Once you log in, it will open Windows firewall and make sure they are all checked
I did this on all computers (even Windows 8 Pro worked). Now everything works fine.