I have done enough now on v3.0.3. It's taken me several months to get round to finishing it and compiling it. But I had to get it done so I finished it this evening. The website (www.quickhash-gui.org) lists pre-compiled binaries for Windows and OSX. I will do Linux soon (UPDATE: @darealshinji has been good enough to compile the debian packages for me as well....I'll upload this weekend)
In the next version I hope to include an installer that has been made by @ravage84 which I thank him for. Sadly I struggled to get it compiled but it is early days so more to comfe from that in the future.