try running cmvs32. i had the same situation but the 32bit version worked fine. i'm not sure why the 64bit version is even there, i don't think there's any real benefit to running a visual novel in 64 over 32.
it seems to be the same, but being re-released at a discounted price (3,300 yen instead of the original 7,100)
this release added "廉価版" into the title...
廉価版
( renkaban ) :
popular edition; bargain priced edition; cheap edition
what are you using for extraction? the latest version of 7zip should be able to extract everything fine. and it's free. i use winrar 4.20 (hehehe 420)... it's not the latest version but it extracts everything i throw at it.