#48 Ability to specify default config file to use

[DigitalKnave]

I often run the same renaming config each time I open Metamorphose.

Would it be possible to get it to either:
- remember the last config used and have that set when it opens again
- have a preference to set the default profile to use
- be able to pass a config file as a command line parameter when running the program

Any of the above options would help but I suspect the first would probably be the easiest to implement.

Thanks