Well I must concur - you are doing a pretty good job.
In an effort to help you find a solution to win 8 export issue I did some playing around today, so here is what I have found...
- your Windows 8 issue: ..... the issue is minor - it doesn't stop anyone accessing anything, only makes it a little more annoying. So for the time being the issue remains open.
I agree it is minor - to a degree.
It is annoying, yes, when the panel closes when clicking the back button.
But as stated, it is more than that, because it does stop the user accessing options presented to them. If they click any hyper links they don't work - it just closes the Charms and does nothing else, which is not good from a PR perspective - imagine an average end user clicking a link to send an email for support and it does nothing, what would they conclude from that?
I am thinking that it may not be the plugin that is at fault.
This morning I did a few install\uninstalls of C2 and found that up until r123 the Win8 Export works perfectly, including any hyper links - however with the release of R124 and all iterations after, the export no longer functions as intended.
This would seam to indicate that the plugin is not at fault here, something was introduced\changed in R124 that has broken both Scirra and iunkin's win8 objects.
There are a number of apps in the store built with C2, Mortar Melon, Battleship Islands, Ballo, Blast The Bricks, to name a few, that also illustrate that the plugins do work (the back button and any hyperlinks all function as expected), but these were built with versions prior to at least r119 I believe. This would seam to indicate that it is not Windows8 causing the issue.
So hopefully all this gives you a starting point to know where to look for a possible solution - start with what was added\changed in R124 that could be causing the issue....