Hi All First Post and I need help!!!

I am new to this!
its not as easy as it looks...
I have a 1971 Buick Riviera Boattail with a somewhat fubared engine, so I picked up an LM7 I also got a VX pro.

Downloaded LSDroid and Tuner Pro, made the wiring for the Blue connector - switches etc..

All works well got LSDriod comms and info, downloaded the BIN file and saved.

Copied the *.dll to the Tuner Pro location

Then opened TunerPro then the appropriate XDF file (matching OS version)
Opened Bin file
My first attempt was to just change VATS to #2 - when I try to save I get a checksum error.

Everything I read says I have to put the correct *.dll files in the Tuner Pro folder and they MUST match, I got the DLLs from the LS Droid folder
so I am a little lost.

What am I doing wrong?

ALSO...

is there a place on the interweb where I can find BIN files with search fields? i.e. Manual trans (its a TH350 so I presume same info) VATs off , just front O2 etc...

I plan to learn as much as I can - but lots of reading to do!

Hello and Thanks
Steve