I find myself in a similar circumstance.
I have used several CAD/CAM systems over the years. Many versions of Bobcad, some pre Y2K Surfcam, Espirt ( early 2004, mainly for WEDM ), MasterCAM v6 and later V9 and now I own the 2013 Alibre Desgin Expert with the (Mecsoft) Alibre CAM2.
I got laid off in 2008 and again in 2009 - so when the offer came to hang up my shop apron and move back into IT Administration and Broadcast Engineering I took the job. It was part time, but paid decent and I lined up a second part time gig to fill the rest of my free time (hours I wasn't getting paid for).
Long story short - the 2 part time jobs fit my schedule and my financial needs.
Well all good things come to and end - and the owners of job #2 decided to hang it up and retire, they sold off the real estate and liquidated the business. This leaves me a good $200+ a week short, so it looks like I'm going to have to grab my apron again and go back to the full time grind, something that I have actually missed dearly.
Problem is everyone expects you to be a Mastercam wizard - and I have not been making chips for nearly 4 years, I have some catchup to do.
Now I DO know G-code, I learned the old school hard way with a pocket trig table and a TI-99 and you hand made every line, and when done, you used a teletype to enter the program and make a punched tape. CAD/CAM was not mainstream yet, a 48K Apple II+ could barely hold the geometry assist software that helped plot arc tangent endpoints for fillets.
Anyway - I need the best bang for the buck, back to business crash course that is out there.
Its not that my current part time job isn't exciting - it just isn't paying the bills anymore. So its time for me to get back to work.