A: No. Never. Altium extensions are build-specific. Attempting this will corrupt the target installation, often requiring a full Altium reinstall.
Since Altium Designer typically requires an internet connection to access the Vault, an offline installation is necessary for secure/air-gapped computers or corporate networks with restricted internet access. altium extension offline install
Q: Can I install multiple extensions at once using offline installation? A: Yes, you can create a single offline installation package with multiple extensions. altium extension offline install
with chosen extensions, typically requiring about 3GB of storage for the full extraction. Workflow Integration altium extension offline install