This happens due to the compatibility with Creators Update. Although the update didn't change much in the Windows OS, certain applications don't work properly because they need an update. This could be the case with ProtoView as well.
On the official website, the software is known to work with some Windows versions, but it appears that Windows 10 is missing from the compatibility list.
Access the page here: https://www.protolabs.com/resources/faqs?tab=protoview