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1. Re: Cannot install Specctr extension in Photoshop CC because it does not contain valid signature
Yuanyuan Liu Dec 3, 2013 1:47 AM (in response to Stratpoint)Hi,
Here is a workaround. Please click "tools"->"preferences", unselect "Allow Extension Manager to access Internet" option, then try to install it again.
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2. Re: Cannot install Specctr extension in Photoshop CC because it does not contain valid signature
Stratpoint Dec 3, 2013 2:49 AM (in response to Yuanyuan Liu)Thanks so much Yuan! It worked!
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3. Re: Cannot install Specctr extension in Photoshop CC because it does not contain valid signature
Feureau Jan 29, 2014 1:59 AM (in response to Yuanyuan Liu)Thanks for this.
I was having the same "does not contain a valid signature" error generated by Red Giant's Pluraleyes extension and couldn't figure out what the problem was. Disabling the "Allow Extension Manager to access Internet" option solved the issue.
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4. Re: Cannot install Specctr extension in Photoshop CC because it does not contain valid signature
Admiral Cook Sep 26, 2014 3:34 AM (in response to Yuanyuan Liu)Trick with changing settings may not work with latest version of Extension Manager.
Revert to previous version of EM to install extensions without error.
Good luck.


