Patch update released v0.2.1

We've just released a patch update to the recent release, v0.2.0. this patch is a bug fix aimed at fixing glitchy behaviour in using the cloud rendering system.

Specifically, when using the cloud system, opening a new file would eventually cause the cloud nodes to turn off. Thats fixed in this update.

Also, there was the possibility of an error wreaking havoc when updates from any render nodes that were processed by the addon, and weren't in