Yup. Aware of this -- it's fixed in 0.8.2.
Thanks for the report!
This is due to some code making assumptions about where the Command Center is located. That "out of bounds {-1, -1}" message is indicating that there is no CC built (default coords) but the game is assuming one has been built.
I use imgbb.com to do inline images. It has the problem of over time if a user removes images the link breaks. After you upload an image, you can copy the address of the image you uploaded, edit your message and use that image address to inline it. It's a bit of a kludge but it works.
Save games are saved in the user directory under AppData. On my system, my username is 'leeor' so the path is this:
C:\Users\leeor\AppData\Roaming\LairWorks
It'll be something similar for you. This is done to comply with Microsofts best practices for handling user data outside of program data.