License

This screen shows the installation’s licence and performs activation.

System

Field	Description
App Version	The running version
Current IO	The current I/O count
Current User	The current user count

Licence holder

Field	Description
Full Name	The person the licence was issued to
Company	The organisation
Email	The contact address

Limits and validity

Field	Description
IO Limit	The maximum I/O allowed
User Limit	The maximum users allowed
Type	The licence type (Key or USB)
Issue Date	When it was issued
Expiry Date	When the licence itself ends
Maintenance Expiry	When the right to updates ends

The two dates mean different things

Expiry Date is the end of the licence itself — after it the installation is unlicensed. Maintenance Expiry is the end of the right to move to newer versions: once maintenance lapses the installation keeps running, it simply cannot be upgraded to a later release.

Confusing the two is the commonest cause of an “our licence has expired” alarm.

Compare Current IO against IO Limit

Current IO is the number of I/O points the licence counts. It is the first place to look when planning a site expansion; on an installation up against the limit, new variables cannot be created.

Activation

Button	What it does
Activate Key License	Activates with the licence key typed into the field
Activate USB License	Activates with the USB dongle plugged in
Deactivate License	Removes the licence

Be careful with Deactivate

Removing the licence leaves the installation unlicensed. It is what you need to move a licence to another server, but if pressed by accident you need the key in hand to activate again.

Related

• Quota Policies — the per-record-type limits