Settings option to change location of working directory?
I would like to move the working directory for Vidcoder to a RAM disk for better performance but I don't see anywhere in the GUI to change this and I can't find an ini file to change it either. Could this be added to the software?
There's no single "working" directory for VidCoder. There is a "Custom folder for previews" option in Global Options -> Advanced. That will change the TMP environment variable which will cause HandBrake to write static previews there. It will also cause preview clips to be generated there. But that probably won't make encodes go faster.
Logs and the main VidCoder.sqlite database file which holds settings, the queue and some other state are kept in %appdata%\VidCoder. Though changing that won't really give you better performance.
As far as I'm aware, all the intermediate encoding state for HandBrake is kept in memory and the final file is output directly to the destination drive.
If you use the Zip archive you can extract VidCoder's program files wherever you want; if it was on a faster disk it would probably be a bit more responsive, but not encode any faster.