DHL try charging a "customs processing fee" or "quarantine inspection fee" in Australia which is pure profit for them. I say "try charging" because you can refuse to pay - they bill you AFTER you receive the goods <duh>. Customs say that unless DHL can produce the relevant documentation you shouldn't pay the fee, and AQIS say you shouldn't pay the quarantine inspection fee unless DHL can produce the quarantine inspection number. So the $25-$45 fee they try to levy on recipients of small packets and parcels is just their extra profit grab. You need to ring them and ask for the customs documentation or AQIS inspection number which they invariably "cannot find" and then generously "waive the fee" :)
I avoid DHL like the plague and always choose FEDEX who've never yet tried to levy these extra profit fees on any overseas package I've been sent.
I beta tested it for the author under OS X, and WIndows 7 and 10 running under Parallels on OS X. It works well. He was running it under Linux. here are some speed compromises so that it will run under all three operating systems. From memory, Windows could be nearly twice as fast, but had to be slowed down for OS X and Linux. Source is available, so you can always tweak it if you use Windows.
I think the problem is that some people buy an open hardware project at a rock bottom price and then expect the same sort of paid support that a commercial product might have during its limited life, but for free of course. I've seen this happen with both open software and hardware projects. It's even funnier when it's an open software project for which they paid nothing.
I guess the trick is in managing unrealistic expectations.
While I don't have an Ir Toy, I did a quick search and found this:
"Looking at the software for the USB Infrared Toy, I discovered a tool called irtoy that records and plays back IR commands. So I thought I’d give this a try. Unfortunately it required a firmware update and when I tried the update it got stuck in bootloader mode and I could not access the USB Infrared Toy! After some cursing and switching of USB ports (and waiting), windows finally found the toy (which turns into a USB human interface device in bootloader mode) and I was able to complete the firmware upgrade. Phew!"
See: viewtopic.php?t=786 which contains an analysis of the issue and a resolution (and also suggests that it is not "bricked").
Of course the other option is to use a PIC programmer which will certainly unbrick any toy, assuming it is in fact bricked. I'm sure you can find some helpful person nearby who can do this for you if you do not have a PIC programmer (PICkit2s can be had on AliExpress for less than $US 9 delivered).
Sorry, I don't have an IR Toy - I just read the documentation. Perhaps you should do the same? Your current firmware provides a URL which has all the details you seem to need.
OSX 10.8 introduced a new security feature called Gatekeeper, which is enabled by default and prevents applications distributed outside of the Mac App Store from launching. There is a workaround for this by allowing applications to be installed from anywhere. You need to open "System Preferences > Security & Privacy" and set "Allow applications downloaded from: (on the General tab) to "Anywhere". After the application is run at least once, you can revert this change if desired.