Welded parts not appearing

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I am trying to weld parts together in KSP with the UbioWelding plugin. The "Weld It" button appears and the in game dialog to weld parts seems to work fine, but the finished part never appears in my parts catalog. The welded part does show up in the UbioWelding Parts directory.

Here are the plugins I am using:

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Here is the version.txt from the welding plugin:

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kerbal-space-program

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