Altium Extension Offline Install Portable Jun 2026

: Instead of connecting to the cloud-based Altium Repository, you configure the software to point to a local directory containing the unzipped offline installer files. Management via Preferences : You can switch the installation source by navigating to Preferences Installation and selecting the Offline installation radio button. Independent Updates

Select from the top right user menu profile dropdown.

Obtain Extension IDs from Altium’s official extensions catalog or a reference installation.

If you are performing a fresh install on an offline machine, you can include extensions within the setup package itself.

Ensure you have the main offline installer for your specific version of Altium Designer. Extensions are often version-specific. altium extension offline install

After installation:

A progress bar will appear as Altium copies the files from your local directory.

In the AIS web interface, navigate to the > Plugins or Software tab.

Restart Altium Designer.

Select and point the path to your offline folder. 4. Run the Installation Go back to the Purchased or Installed tab.

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Check the option for (or Local Folder depending on your Altium version).

Restart Altium Designer when prompted to finalize the installation. Troubleshooting Common Offline Installation Issues Extension Not Visible in the List : Instead of connecting to the cloud-based Altium

Most users interact with the "Extensions and Updates" view, a friendly GUI that lists available updates with shiny green download arrows. But behind that GUI is a robust file system that doesn't actually care if the internet exists. It only cares about the file format.

Install using Altium’s Extensions & Updates dialog:

Run the Installer.exe from your offline installer zip package.

After unzipping the package on your offline PC, you must tell Altium Designer to look at the local folder instead of the cloud. Go to (or click the gear icon). Navigate to System > Installation . Select the radio button for Offline installation . Extensions are often version-specific

The offline package loads, but installation fails with a compatibility error. Cause: The downloaded extension version is designed for a newer or older build of Altium than the one currently installed on the target machine. Fix: Ensure the extension's filename, release notes, or download page specify the target Altium version (e.g., PCB_Plugin_24.0.1_x64_Release ). Download the version that exactly matches your software build.