If you are a dedicated SketchUp user, you are likely familiar with the powerful suite of plugins by Fredo6, such as RoundCorner, Curviloft, and JointPushPull. These tools rely on the core library plugin LibFredo6 to function.
While keeping software up-to-date is generally the best practice, there are times when a specific workflow, a legacy plugin, or an older version of SketchUp requires you to run an older version of LibFredo6. This post covers everything you need to know about finding, installing, and managing older versions of this essential library safely.
New updates bring new features, but they also bring bugs. Many professional modelers prefer to stick with a known, stable "old version" of LibFredo6 that has been tested for hundreds of hours in their production pipeline.
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To update an old version of , a shared library required for popular SketchUp plugins like RoundCorner JointPushPull , follow these steps. Recommended Update Method (Automatic)
The easiest way to keep LibFredo6 and all related plugins up to date is through the Sketchucation ExtensionStore tool Open ExtensionStore : In SketchUp, open the Sketchucation toolset. Check for Updates
: Click the gear icon at the top left to see a list of extensions needing updates. Update All
: Click "Update All" or the individual "Update" button next to LibFredo6. Restart SketchUp quit and restart SketchUp for the update to load properly. Manual Update Method (RBZ File)
If you prefer manual installation or are using an older SketchUp version: Download the RBZ : Get the latest version from the LibFredo6 page on Sketchucation . A free account is required. Install via Extension Manager In SketchUp, go to Window > Extension Manager Install Extension and select the downloaded Restart SketchUp : This step is critical to avoid loading errors. Legacy Support (For Older SketchUp Versions) If you are using a version of SketchUp older than 2017 , you must use "frozen" legacy versions of the library. SketchUp 2016 and older Archived LibFredo6 v9.5k SketchUp 2017 to Present : Modern versions of LibFredo6 (v10.0+) are compatible. Troubleshooting Tips LibFredo6 Installation in Sketchup 2025 - Extensions 9 Aug 2025 — libfredo6 old version upd
Subject: Updating an Old Version of LibFredo6
Response:
If you are using an older version of LibFredo6, here is the recommended approach to update it safely:
Do NOT update manually by replacing files unless you are sure. LibFredo6 is a shared library used by many of Fredo6’s tools (RoundCorner, FredoScale, TopoShaper, etc.). Mixing old and new versions can cause conflicts.
Recommended Method – Use Fredo6’s own tool:
Extensions → LibFredo6 → Check for Updates.Clean Manual Update (for very old versions):
Window → Extension Manager (SketchUp 2017+)..rbz file via Extensions → Install Extension.Important Notes:
LibFredo6 → Reset Preferences.If you are using SketchUp 2013 or older:
Let me know if you run into any specific error messages or need help identifying your current version. Essential Update: Rolling Back and Managing LibFredo6 (Old
Keeping Your SketchUp Legacy Alive: A Guide to LibFredo6 Old Version Updates
If you are a SketchUp veteran, you know that LibFredo6 is the backbone of the most powerful extensions like RoundCorner, JointPushPull, and Curviloft. However, a major shift in the Trimble framework changed how these plugins work for older versions of SketchUp.
Whether you are intentionally staying on a legacy version of SketchUp or just trying to fix a "broken" plugin, here is everything you need to know about updating and managing LibFredo6. The Great Divide: SU2017 and Above vs. Older Versions
Since the release of v10.0, newer versions of LibFredo6 are strictly compatible with SketchUp 2017 and later. If you are running an older version of the software, simply "updating" to the latest file on the SketchUcation PluginStore will likely break your workflow.
For SU2017+ Users: You can always find the most current version (like v15.9a) on the main LibFredo6 PluginStore page.
For Legacy Users (Pre-SU2017): You must use the archived legacy versions. These are prefixed with the "Prior_2017" keyword. Where to Find Old Version Updates
If you are running SketchUp 2016 or earlier, do not download the standard RBZ file. Instead, look for:
Prior2017 - LibFredo6 (v9.5k): This is the final stable version for SketchUp 8, 2013, 2014, 2015, and 2016.
The SketchUcation Legacy Archive: This dedicated forum post contains links to all compatible legacy versions of Fredo6's plugins. Pro Tips for a Smooth Installation Changelog (summary)
Restart is Mandatory: Every time you install or update the library, you must quit and restart SketchUp to sync the library with its dependent extensions.
Use the SketchUcation ExtensionStore Tool: This is the easiest way to manage updates. It will notify you when a new version is available and handle the installation directly within SketchUp.
Manual Installation (For Pre-2017): If the Extension Manager isn't cooperating, you can manually extract the LibFredo6 ZIP content into your Plugins folder.
Check for "Check for Update": In older legacy versions, Fredo6 has actually disabled the "Check for Update" feature to prevent users from accidentally installing a version that is too new for their SketchUp build. Troubleshooting Common Issues
Plugin Not Showing? Ensure that LibFredo6 and the specific extension (e.g., RoundCorner) are installed in the same folder.
Permission Errors? On Windows, it is often helpful to run your SketchUp installer as an Administrator and select "Repair" to fix permissions that might be blocking the plugin from loading.
By sticking to the archived legacy versions for older software, you can ensure your favorite design tools keep running smoothly without the headache of "version mismatch" errors.
Are you having trouble with a specific Fredo6 extension not loading after an update?
Prior2017 - LibFredo6 - Archived version v9.5k - SketchUcation
Here’s a helpful, practical story about updating an old version of LibFredo6 (a popular plugin library for SketchUp) — framed as a lesson in keeping tools current.