WARNINGBackup your topologies before.
Just install the new version on top of the previous installation.
If you are using Linux packages just upgrade GNS3 via your system package upgrade.
Your GNS3 VM version need to the same as the GNS3 client.
WARNINGYou will found on internet methods using the pip command. Do not use it for the GNS3 VM, this will upgrade GNS3 but not the dependencies.
NOTEBefore upgrading it we recommend that you snapshot your GNS3 VM in your virtualization software (VMware or VirtualBox). In case of issue this will allow you to rollback.
In order to upgrade it go to the information and click on OK
Select the upgrade option and run it:
You can also change the version branch use by your GNS3: