i need to make a stairs with curve shape, and i see on youtube how to make typical copy for curve line with jhs power bar. maybe some one has it and can share to me for free. thankyou.
To download you need to register, but it doesn’t cost you anything to register. 
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There was no precondition mentioned for or against registration… 
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Hi Julian, i realise the post from another user i am referring to is a long time ago, but you come up as a helpful part of community on this… I have just registered for Sketchucation and downloaded the JHS Powerbar, went in to Extension Manager to install it, and comes up with a the need for Signature information, saying it is unsigned? how can i deal with this? I have gone into SketchUp Loading policy but not clear from that
You have gone to the right place. You can allow all unsigned extensions to load.
by the way JHS powerbar was the only extension that failed to import in 2025 with the new migrate extensions tool (which appart from that worked great !), I had to manually copy/paste the JHS folder to fix it.
It is worth noting that JHS powerbar is just a wrapper around a bunch of other popular extensions. If any of them won’t run, they can take the powerbar down with them.
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Hi klaws67,
Signed extensions mean that the SketchUp developers have inspected and vetted the extension. This serves for purposes of safety, coding convention and clashes with other extensions.
You need to change your extension permissions to accept all levels of extensions, but only do this if you plan to download and use extensions from trusted sources. I have not yet run into major problems using unsigned extensions, the occasional extension that was coded by a novice yes, but then I merely uninstall it.
A good rule of thumb is to not install extensions unless you really need to / need it. Too many extensions bogs SketchUp down (ask me how I know - hehe).
I hope this helps?
Regards,
Julian
No. Signing just means that the author sent the extension through the Trimble developers’ site that generates a checksum to verify that it hasn’t been tampered with, and optionally encrypts the Ruby to protect intellectual property. This can be done for any extension, even ones from other sites. It is your assurance that the code is as the developer wrote it, not hacked by someone else.
The examination you describe takes place when an extension is submitted for publication on the Extension Warehouse.
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Thanks i can see it did load in the end