Import the driver's license

The driver checks its license itself, without a network and without activation. The license is a file with the extension .lic that you receive when you buy the driver at wvds.it. It applies to the driver, not to a single data source: in one of the places below, it covers every data source and application of the user or of the machine.

Without a valid license, the driver still works fully. The first 30 days from the first connection are an evaluation period; after that, only a notice remains. No connection fails and no query waits because of the license.

Solution overview

The driver reads every *.lic file in these places, in this order, and adds the licenses up:

Place	Applies to	Suited for
File or folder in the environment variable `WKL_LICENSE_PATH`	whoever the variable reaches	deployment by IT, special locations
`%APPDATA%\WKL\Licenses\`	the signed-in Windows user	single workstations; “Import license” copies here
`%PROGRAMDATA%\WKL\Licenses\`	all users of the machine	software distribution, Group Policy

An application that ships the driver can also bring the license and put it in these places when it starts; the driver then finds it like an imported one.

Import the license on a workstation

Prerequisite: the driver is installed, and a data source with the driver Wkl OData is set up or is being set up.

Open ODBC Data Sources in the bitness of your application, for example from the Start menu (“ODBC Data Sources (64-bit)”).
On the User DSN tab, select a data source with the driver Wkl OData and choose Configure…. If there is none yet, choose Add… and Wkl OData.
At the bottom of the dialog, choose License….
Choose Import license… and open the .lic file.

Result: Below the list, the dialog says which license with which revision was imported and where it is (%APPDATA%\WKL\Licenses\<license>-r<revision>.lic). The list shows the new result, for example “Licensed (LICENSED)”. A notice in the data source dialog disappears at once; the application doesn't have to restart.

Dialog "License - Wkl OData" with the sentence that the license applies to every data source of the Windows user, below it the lines Product, This build, Result "Licensed (LICENSED)", Holder, License with revision and key environment, Right, Quantity 20, Unit workstation, Use perpetual, Updates until, Support until and Redistribution, at the bottom the buttons "Import license…" and "Close"

The “License” dialog with a valid license for 20 workstations (development build, test license from the shop with a key of the test environment).

A file that isn't a valid license isn't copied. The line below the list then names the file and a code, for example E10_SIGNATURE_INVALID for a changed file; include this code when you contact the manufacturer.

Store the license for all users of a machine

As an administrator, create the folder %PROGRAMDATA%\WKL\Licenses\ if it doesn't exist.
Copy the .lic file into it, for example through software distribution or Group Policy.

Result: Every user of the machine is licensed from the next connection on; the License dialog shows the license for every user.

Alternatively, set the environment variable WKL_LICENSE_PATH to the file or to a folder with licenses, for example a share that only IT can write to.

What the driver shows

Result	The driver
Licensed	works without a notice
Evaluation (no license for the driver, first 30 days)	shows the days left
No valid license (after the evaluation)	shows a lasting notice
Maintenance ended	shows that this build was released after maintenance ended; builds released up to the end of maintenance stay licensed
Term ended (license with a term)	shows the end of the term

The notice appears in the data source dialog, in the Connect dialog and in the sign-in form whenever one of them opens anyway, and in the trace. It names the reason and the way out: import a license or buy one at wvds.it. It never stops anything.

Notes

No binding to the machine. The license contains no hardware characteristics. Moving to a new machine or reinstalling needs only the file.
The quantity is shown, not counted. How many workstations a license covers is stated in the license and the contract; the driver doesn't count.
Maintenance. A license states up to when released builds are covered (“Updates until”). A build released before that date stays licensed for good, even after maintenance ends.
Evaluation per user. Its start is kept in %APPDATA%\WKL\Evaluation\odata-odbc.json.
Copy for support requests. The list in the License dialog can be selected and copied, for example for a request to the manufacturer. It contains no prices and no email addresses.