There are different scenarios, where a migration of the Desktop Client is available....

The desktop client is using app tokens to authenticate with the server....

System requirements...

Whether you want the latest features, want to help with testing, or just want to wait until everything is perfectly ready to go, we’ve got options for you. The desktop client has 4 update channels: Enterprise, Stable, Beta and Daily. ...

When to Disable On-Demand Synchronization...

Overview...

We want to record a memory image (or dump) of the desktop client in case it crashes while running on Windows....

Some of those steps are necessary when some of your folders of files may have been synced read-only due to restricted server permissions....

Overview...

There are operating system and API limitations when enabling virtual files on Windows....