Sorry for the delay while I looked into this with Toby. The app itself wasn't the issue - it *is* fully Windows 10 compatible, but unfortunately we recently had an issue with the activation text being sent to Windows 10 users. As a result, we decided to temporarily remove this from the store to work on. The issue has been resolved now and the app should be back on the store soon, so keep an eye open for it.
Sorry for any confusion or frustration this caused.
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