This is the licensed 64-bit version of GenMerge.   Using the 64-bit version allows the information for more individuals to be loaded into memory.  We recommend this version for those customers running a 64-bit version of Windows.
 
If for any reason you are not happy with your purchase, please let us know within 30 days and if we are not able to address your issue, we will cheerfully refund your full purchase price.