SketchUp now has three different Extension policies you can select that effect what extensions can and cannot be loaded when SketchUp starts. Starting with SketchUp 2016, Registered Extension Developers can claim their software by signing it digitally, saying “I made this”, but in a secure coded format. Everyone should download the most recent version of any extension they use from the Extension Warehouse, the author, or the original trusted download source. You might contact the author of any extensions that are not digitally signed and ask them to look into this new feature.
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