use
/layer1/video/effect1/param2/values
for layer 1's effect

similarly you can address a clip directly
/layer1/clip1/video/effect1/param2/values

you could try TCPSyphon and TCPSpout
and there are also NDI bridges for Syphon and Spout

do other apps hang as well?
for example try scrolling slowly in Chrome

log in to your account http://resolume.com/shop/account.php
you should see your registration keys there

I'd do that via OSC.
https://pypi.python.org/pypi/python-osc
I also have been toying with the idea of making a motorized fader OSC console with a raspberry Pi for a while.

you could: use the fill on layer 1 in a clip use the key on layer 2, set layer 2 blend mode to 50 mask an set layer 2 opacity to 100% add a Layer router from the sources to layer 3, and launch it. add a Solid Color to layer 4 set it to 0/brightness to create a black fill over the keyed content, then...

if you saved/overwrote the composition with the effects unconnected then they won't appear again.
You'll have to use a backup comp or an older version.

dropped these into the features bucket.

OBS studio can record and broadcast from syphon sources.
you'll obviously need a powerful enough computer to do the encoding real-time.
Or use a capture card with another computer.

ebay/alibaba
look for pciex16 riser
I don't know if the x1 to x16 version has all pins inside the x16, but the x16 to x16 ribbon should.
or get a bad motherboard as donor
I hope you have a hot air solder, you'll have a bad time with a solder iron.