Strange, I used the zip Project from UE4 Editor to create this zip.
Nevertheless, I’ll create and upload a new zip file and will contact you here when done - hopefully tomorrow.
Sent you a new link. Please try. 
Many thanks.
Are you able to see your GetProjectVersion C++ class if you search for it in the Content Browser? If so, try making a blueprint based on that and seeing if your function shows up in that blueprint.
hmm… no, can’t see it. 
hmm… I made it work, but it still feels that there is an issue.
I did:
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delete the Visual 2015 file/project
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(re-)generated a visual project
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tried to insert my Blueprint C++
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BUT it didn’t work saying that I need to rebuild the whole project
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Rebuilded the project
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(oh wonder) I can see my Blueprint C++ in content browser
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inserted the code
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clean build in Visual editor
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BUT got errors that .dll wasn’t readable
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closed Visual 2015 and Editor
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rebuild project again
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now it’s working
but again, this still feels wrong, as I tried in other of my projects and it works without rebuilding, just “Add Blueprint C++”, insert code, clean build in Visual 2015 (without closing the one or the other) and finally using.
strange…
I am glad to hear that you were able to get it working. While this is a strange occurrence, it is possible that there was something that got corrupted in the project which required you to rebuild the project in Visual Studio. Are you able to see the function now in your blueprint?
Yes, I can see and use the new Blueprint now.
But for every new C++ Blueprint I need to do this procedure as well, so just rebuilding (once) is not the solution.
For now my issue is fixed and I will handle it so, if there is a chance or idea how to fix it permanently I would be happy to get this solution.
Many thanks for your help.
As this issue has currently been unable to be reproduced in a clean project, unfortunately there isn’t much else we can do. However, if you happen to see this issue appearing in other projects, or if it becomes a major blocker for you, please re-open this topic with additional repro information and I’ll be glad to take another look at it.
Have a great day
I’m having this issue or something very similar to it. I ported my project from 4.14 (From epic launcher) to 4.15(From source + PS4) and now every time I try to do anything with a blueprint who’s base class is in c++ the unreal editor crashes.