the 3d wox looks lime a decent slicer.
Just make sure you switch to 'ADvanced' mode. Thatw ay you can control and change all the bits you need to change and control.

For files - your best bit is probably a facebook group - most of them have file repositories with firmwares.
facebook groups are not as useful as you'd think, as they are mostly full of people wingeing and insisting that you have to rebuild the machine to get it to do anything.
But the file repositorires are useful :-)