One long running Windows Explorer bugbear is that SKP files etc show an image in their file-icon,
but SketchUp’s .SKM [material] and .Style files do not
[of course they do show up in SketchUp itself, but use a generic icon in Windows Explorer].
There are paid 3rd party apps to fix this, but the free ones
[e.g. SageThumbs] fail with SKMs - that's until now.
There is a good free and safe alternative called ‘Icaros’.
It’s simple to install and use.
You need to add this to its supported filetype lists -

;.style;.skm

and restart to see your Style and SKM files images in Windows Explorer file-icons…
https://github.com/Xanashi/Icaros/releases/tag/v3.3.5

Their was a glitch in the version of SketchUcation tools that was available briefly a few days ago.
If you installed that you can get license error messages.
It was reverted to to previous version v5.0.6 in the PluginStore, and you should try and install that to see if the error is resolved.
After a restart, if the problem continues let us know.
A correct and updated version will be published asap...

Sorry, but you need to get/install the current version of the SketchUcation tools [5.0.6] -
a briefly available update was quickly found to be causing some users issues with their licensing.
It's been reverted, but a corrected and updated version should be published soon.
If you are still experiencing issues with this currently available version then please let us know, and well strive to fix things quickly...

@inuk228
And your question is ?

Version 5.0.7 is available soon watch this space.
Use v5.0.6 for now...

How big is that object ?
Small geometry has issues because points closer than 1/1000" are regarded as coincident by SketchUp's engine.
So tiny edges aren't made and the associated face can't be supported.
Have you tried scaling it up x100 [or more] doing the 'rounding' then scaling it back down.
Tiny geometry can exist within a model, but it can't be created by SketchUp.

If you want to disable it then you should use the 'SketchUcation' Plugins Manager red-button to 'Unload' it.
After a restart of SketchUp it should no longer load.

Pour désactiver ce plugin, utilisez le bouton-rouge «Décharger» du Gestionnaire de Plugins «SketchUcation».
Après le redémarrage de SketchUp, il ne devrait plus se charger.

@fredo6
I think it's best for a bent object's geometry to follow a 'curve' and start perpendicular to the start/end segment. But if the path is a full circle the bending should start perpendicular to a mid-segment, to keep the objects 'endmost' dimensions correct: and if it's around an arc [partial circle] that's user-defined it should be treated like any other curve: but if it's a swept form around a notional partial-circular path, that should then start/end perpendicular to a half-segment - that way the bent form stays as dimensionally true as it can be.

Which extension[s] did you buy a license for ?
Have you looked in https://sketchucation.com/webshop/my-licences.php

Can you please explain more about its function and use...

If you have exceeded the trial period you must buy a license...

There is currently no license for this extension, it's a beta release.
Please post error/messages etc which lead you to believe a license is needed...
It works for me, no issues.
There is no 'licensing' entry in its submenu ??

@Stephen-H

PS: I believed you... but if you go the the EW's page Github link to TT_Lib and go to this page:
https://bitbucket.org/thomthom/tt-library-2/downloads/?tab=tags
Scroll down to 2.10.2 and on the right click ZIP and an old archived version can be downloaded.
Then extract the ZIP file's contents. You only need the TT_Lib2.rb file and TT_Lib2 folder - ignore the rest.
Copy those two into your Plugins folder [you can open that using the Extensions > SketchUcation submenu item] and then restart SketchUp to sync. This old Lib is not 'signed' in its subfolder, but as long as you have your Extension Manager > Loading policy set to 'Unrestricted' that won't matter.
Does that work ?

@Stephen-H

The current version 2.15.1 works fine with the latest version of CleanUp, up to and including v2026. What is your issue exactly ?

I haven't tried it on v2019 like yours, as I no longer have a copies installed older than v2023 - TT_Lib's EW page says, compatible >= v2022.
I suggest you try and contact @thomthom direct and ask if he has kept an archived version ?

When you say 'this' please be clear. The RBZ for the SketchUcation toolset which also control the licensing and ExtensionStore dialog etc is easily installed using the native Extension Manager > Install... button. Restart SketchUp afterwards to sync everything. It appears in its own submenu under Extensions and there is also a Toolbar.
LibFredo6 is not needed for the toolset, but it is vital to all of Fredo's extensions.
If you have not installed SketchUp itself 'properly' then you do not need to Uninstall and Reinstall it, instead close SketchUp, then find the SketchUp Installer's exe file in your Downloads folder [or download a fresh copy]. Select the exe file's icon, right-click > context-menu > Run as administrator - a dialog should open, accept the 'Repair' option, this will reset all of the permissions properly so extensions can install and save preferences etc. In a few rare case with some of Fredo's stuff a further manual deletion of a badly permission-ed subfolder etc is occasionally necessary, but let's cross that bridge as we come to it !

@Tpdart

Explaining how you fixed things helps others reading this, and gives useful feedback to moderators and experienced users who might be 'advising'...

Did you try doing the Signature file deletion that the dialog suggested and try again ? Also check that the following extensions are up to date and installed and SketchUp restarted - SketchUcation toolset [for the licensing], the actual Extension[s] in question and if appropriate LibFredo6.

If you have renamed your computer or copied files over from elsewhere, then this error can occur. If you Computer's name [and indeed your User-name] go against the recommended format of just ASCII letters + numbers and some limited punctuation - e.g. you've used accented letters or special-characters etc - then this can also cause errors like this - so try to rename your computer sensibly...

@LayaCZ

I have tested the RBZ and it is definitely installing SubD in error, although the RBZ is properly named ?? Perhaps @thomthom or @rich-o-brien or @Gábor can shed some light on this weirdness

Have you installed and restarted the following latest versions from or PluginStore / ExtensionStore -
SketchUcation tools
LibFredo6
Each of the Fredo's extensions raising the issue

Also issues can arise in reading the license file if your Computer or user-account has a name that doesn't follow the Microsoft naming requirements.
That is just ASCII characters alphanumeric and some limited punctuation - so for example - users with accented or foreign characters sometimes get this kind of issue as the paths etc are sometimes confusing to Ruby interpretation...

Here's v1.4
https://sketchucation.com/pluginstore?pln=TIG_ShowTime

The Export PNGs coding has been streamlined and the time taken per image & total is now reported in the RC.