I'm a total newbie, sorry if this is super obvious stuff.
Just bought RF 2013 LE, and trying to install everything from the emails I got.
I have several questions:

1) Do I even need to install the License Manager? Can I do RFRK etc. without the LM running?
2) I want to use something like Maya or Cinema4D to render the fluids, anyone have any opinion on which program is better or for my purposes easy to use but still renders great looking water
3) What is the RFRK for? Is it better to render in RFRK? Or just use the plugin? I saw it said something about rendering meshes at render time but I have no idea what that even means. Does it mean it's faster in some way? Can I do everything on 1 machine without RFRK? Or RFRK could still possibly be used on 1 machine for some reason?
4) I get an error when I try to install LM based on the instructions here:
http://support.nextlimit.com/display/rf ... stallation
I get:
./nl_license_manager -a /<full path>/rflearnlic.txt
[License Manager Warning]: Invalid license.
This is LE, so I thought, maybe it's this local mode thing (what does that mean?)
I just followed instructions and exported the env var RF_USE_LOCAL_LICENSE=1
But it made no difference same error
I tried removing the
"# LICENSE ENDS HERE" part of the text file but that also did not work.
Strangely though, it does work when I installed RF2013 itself.
As a side note I'm trying to use the license that starts with:
#######################################################################
# REALFLOW NODE LICENSE DATA STARTS HERE
Is that the right one?
Update:
I just installed the rfrk license - that one went in fine on the same machine I have the GUI on.
Does that mean it somehow detected that I have the GUI on this machine so I don't need the node license, whatever that is?
Is that why the node license didn't install and said it was invalid license?
Do I not want/need the node license?
I'm totally confused.
Thanks in advance for any help.