Usbio 3.10 was available to download from the developer's website when we last checked. We cannot confirm if there is a free download of this software available.
We cannot guarantee that the program is safe to download as it will be downloaded from the developer's website. Before launching the program, check it with any free antivirus software. The program is included in Development Tools. The default filenames for the program's installer are USBIO120.exe, USBIOAPP.exe or USBIOcw.exe etc. The most popular versions of the tool 3.1, 2.9 and 2.6. The actual developer of the program is Thesycon.
From the developer:
Standard USB devices are normally supported by class drivers already included in the Windows operating system. In many cases, a particular USB device cannot be assigned to a device class because it has to fulfill different requirements, or because to implement the class specification in the device firmware is too time consuming.
You may want to check out more software, such as USBIO Development Kit, which might be related to Usbio.