Note: these are Linux-based instructions! If you're on Windows or Mac things will be different.
Download u-Blox u-center. When you get to this page, scroll down a bit until you see the button for "Documentation & resources". There you'll find a section called "Evaluation software" where you can download a zip file.
Yes, it is a windows executable, but we assume you installed wine. Once you download the zip file, extract it. Then go with your command line to that folder and type wine u-center_vXX.xx.exe (whatever the latest version number is). That will launch a Windows installer.
Go through the installation process, but don't accept the standard installation path; that probably won't work (and will be a hassle to find anyway). Put it somewhere on your hard drive that you can remember and easily find.
After installation, plug your Ardusimple into your computer with a USB cable (it needs to be the USB port labelled power and GPS, not the one on the other side, which is for the radio). Navigate again on the command line to where you installed the program and type wine u-center.exe. This will start the u-center application.
You may have to set the permission on the emulated Windows port to access the device via USB. For example, sudo chmod 777 ~/.wine/dosdevices/com33.