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Tizen OS seems broken

I recently got an RD-PQ device mailed to me with which I've been porting games to. The latest time I ran one of my games, I had to reboot the device as the games would not be recognised as packages anymore. After the reboot, only the 'Files' and 'messages' applications remain visible, and I can't install my game anyways. 

Methinks I need to reflash the device... but I can't find any instructions on how to do so for Windows. 

Alternatively, is there any way to fix the existing Tizen install on my device without having to reflash? :)

Thanks in advance!