# \#unsigned

**URL:** https://forums.sketchup.com/tag/unsigned/924.md

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## [Extensions error ("invalid signature")](https://forums.sketchup.com/t/extensions-error-invalid-signature/116211)

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**Author:** [@glendalelest](https://forums.sketchup.com/u/glendalelest)\
**Replies:** 1\
**Last updated:** [February 12, 2020, 6:33pm UTC](https://forums.sketchup.com/t/extensions-error-invalid-signature/116211 "2020-02-12T18:33:24Z")

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what do i need to do to get rid of “invalid signature” error when i want to use cutlist bridge 4?

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## [Can you install extensions and/or plugins to a trial version of desktop SketchUp Pro 2019?](https://forums.sketchup.com/t/can-you-install-extensions-and-or-plugins-to-a-trial-version-of-desktop-sketchup-pro-2019/100678)

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**Author:** [@jeremyhrvtn](https://forums.sketchup.com/u/jeremyhrvtn)\
**Replies:** 3\
**Last updated:** [August 13, 2019, 8:26pm UTC](https://forums.sketchup.com/t/can-you-install-extensions-and-or-plugins-to-a-trial-version-of-desktop-sketchup-pro-2019/100678 "2019-08-13T20:26:56Z")

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Hi, I was wondering if someone might have a quick answer for me regarding the use of plugins and extensions with the 30-day free trial of SketchUp Pro 2019. I tried to install the Bezier Tool and it appears as unsigned…

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## [What is the value of a current signature on an extension?](https://forums.sketchup.com/t/what-is-the-value-of-a-current-signature-on-an-extension/43911)

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**Author:** [@sjdorst](https://forums.sketchup.com/u/sjdorst)\
**Replies:** 27\
**Last updated:** [May 5, 2017, 3:42pm UTC](https://forums.sketchup.com/t/what-is-the-value-of-a-current-signature-on-an-extension/43911 "2017-05-05T15:42:15Z")

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Continuing the discussion from Can't update Eneroth's Solid Tools: Very interesting … I just took another look at my installed extensions. Your Eneroth Solid Tools now shows a good, not outdated signature. This is a c…

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## [The su\_solarnorth extension is blocked, can anyone help?](https://forums.sketchup.com/t/the-su-solarnorth-extension-is-blocked-can-anyone-help/38094)

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**Author:** [@SketchUpper](https://forums.sketchup.com/u/SketchUpper)\
**Replies:** 2\
**Last updated:** [January 28, 2017, 7:16pm UTC](https://forums.sketchup.com/t/the-su-solarnorth-extension-is-blocked-can-anyone-help/38094 "2017-01-28T19:16:43Z")

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Hi All, I am a novice 2017 Pro user, and cannot get past this hurdle; the polar north extension, that I hope will help with a more realistic shadow effect, shows up as blocked in the extension manager. Can anyone help? …