First, an admin user of your account must turn on V4 accessibility. Then, users will have the option to individually opt-in to the new experience.
The following toggle will become available on the General Settings page:
Go to Settings (bottom left corner of Accelo) and select General Config.
Scroll down to Beta Features.
Set V4 Beta to Yes.
Save.
To disable, an admin user may access this screen and toggle V4 Beta to ‘No’. When an admin user toggles V4 Beta off, V4 Beta will be disabled for all account users regardless of their user settings. A user's previous settings are remembered, so if an admin toggles v4 Beta back on, the user's previous setting will take effect again.
When an account has V4 Beta accessibility turned on, all users associated with the account will have the option of toggling V4 Beta on and off for themselves.
Users can do so from their User Preferences:
Hover over your account icon in the upper right corner of Accelo.
Select My Preferences.
Scroll down and Expand Labs Settings.
Toggle V4 Beta to On.
Save.