UN$ not working well in 2012

[.chad]

I have & use the Un$ lisp to clean up drawings on a very regular basis but with ACA 2012 it frequently does not finish the routine and pops out an error. Is it possible to fix it to work in 12? I'm downloading 2011 now from the subscription site but I hate having multiple installs if I can avoid it - especially on a fresh PC. The error message says:
Compile error in hidden module: MainUnbind

The lisp itself will take layers created by binding x-refs that have $ all over them (SA2-11$0$DIM, SA3-11$0$DIM etc) and combine them into one layer (DIM) making cleaning drawings infinitely easier.

The attached .zip has the lisp used to call the program and the .dvb as well as an old version of the file (not sure why I have it...)

I'm using ACA 2012x64 on Win7x64