License of AddOn

[kisolre]

If it is the same exact code how can it have different license? How does dual licensing work anyway?

Please fix the typo in the thread title.

[wmayer]

Would it be possible to use either GPL2 or GPL3 for providing the code?

You can add two licenses, the GPLv2 and GPLv3. Alternatively, you can say it's GPLv2 or any later version because this implies GPLv3.
Then the user of the code can decide under which license he wants to use it.

If it is the same exact code how can it have different license?

The author can do whatever he wants. Having two or more licenses is not so uncommon.

Example:
A library has a commercial license so that a company can pay a fee and is allowed to use it for its own projects.
The same library is released under the GPLv3 so that open source projects can use it without paying money but then has to release the work under GPLv3, too.
E.g. Coin3D in the past was dual-licensed (commercial and GPLv2) and Qt has even three licenses: commercial, GPLv3 and LGPLv2/LGPLv3

How does dual licensing work anyway?

The user of the license can decide under which terms he wants to use it.

[bernd]

many thanks for all the help Werner.