@LudvigNyman,
Sorry for the late response. After realizing the clunkiness of the script I wrote, I made a couple of improvements to Ladybug core that make the code within the custom component I made cleaner:
clearskyEPW.gh (481.5 KB)
This should generally make it easier for people to use the WEA class to make custom EPW files and I imagine that it will become particularly relevant once I add the Zhang-Huang sky model to the WEA class, which is pretty much what all companies that synthesize EPW files use to fill in missing solar radiation data.
The update Honeybee+ component should update both the LB+ and the HB+ libraries. Is this not the case on your system? Also, remember that you need to restart Rhino after updating you libraries to have it re-load in the new libraries.
-Chris