Is it possible to Install / Upgrade to latest Mantis Version

[spacomp]

Is it possible to Install / Upgrade to latest version of Mantis and still retain the classic look and feel of it as we get it from previous versions of it?

[atrol]

The latest version that comes with the classic look is 1.3.11 at the moment.
Until now, you can install 1.3 and 2.x in parallel and access the same database as there is no difference in database schema.