[LAU] GPL vs GPLv3

[Atte André Jensen]

Hi

I write a little code from time to time. I just discovered that at least 
some of it is still under GPL. Now I'm thinking about changing that to 
GPLv3.

1) Can I Just Do It, simply by stating on the webpage and/or in the 
software that it's under GPLv3.

2) Is it (as I understand from 
http://www.gnu.org/licenses/rms-why-gplv3.html) recommended to change to 
GPLv3? What are the main advantages (both for the community and me) with 
GPLv3 and are there any drawbacks?

NB: I *did* try to read + understand the text on the GPL webpage, but 
it's a little too much for me. So I'm hoping for some simple pointers 
and recommendations.

NB2: I also wrote some "patches" for various synths and stuff like that. 
I know it's been brought up here before, but forgot the answers. Could 
that be released under GPL(v3) as well or is it better to use CC, and if 
so which dialect is recommended? The "patches" are everything from ams 
presets, zyn presets, pd patches + externals, csound/blue code and some 
more I might have forgotten.

-- 
Atte

http://atte.dk   http://modlys.dk