Alright it is a problem on our side caused by your Windows localization. Thanks a bunch for assisting us on pinpointing it.
This command should open the documentation fr you:
C:\Programme\"Gemeinsame Dateien"\"Microsoft Shared"\"Help 9"\dexplore.exe /helpcol ms-help://justcode
I am also attaching an internal build with that issue fixed. It should be fairly stable overall although it's not production quality. Most probably it'll work just fine for you, though. Try it out and see whether it does the job for you. We are gonna release a stable build with that issue fixed the next week.
Once again thanks for the help. Please, do not hesitate to contact us if you have any further issues.
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