1. Multi-Tasking

You wanted it - you got it! Freecell Solver supports multi-tasking since version 2.4.0.
Run more than one scan on the same states collection.
My early attempt at introducing multi-tasking when working on MS DevStudio failed to produce a working code.
The next attempt that was planned more thoroughly and executed using gvim on Linux succeeded with blazing colours.
(and they claim IDEs are superior)