I have encountered this issue before with some software and I think with Bendmx also, now for the good news theres a simple solution, well fairly simple.
The code files are I think all intact but some of the resource files (images etc ) are missing.
You remember the old resource hacking tool you used some months ago to look at text strings in some of the programs for translational reasons , well that same tool can be used to tear the missing resources (BMP files in this case) out of a compiled version of the program and added to fill in the missing gaps in the src files, I am pretty sure this is all that is necessary.