Hog 3PC crash issue.

Today we were trying to merge two fixture libraries together. When we re-opened the show file, using the "Fixture" button causes the program to crash. The strange thing is that even backup files from before the merge cause the same problem. This is also the only button that causes the problem. I'm attaching the show file if anyone wants to try on their machine. We have tried a few different systems here with the same result.
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