[moneydance] moneydance.md file corrupt or missing. error

[Larry Alkoff]

When I try to open Moneydance 640 I get a message saying
"The file 'moneydance.md' is corrupt or missing.  It can be restored 
from backup(s).  Please select one from the following."

I then get a list of 3 actions to Create New, Open Existing or Import 
File.  When I exit out of this I get the message
"ignoring invalid argument: -Xmx512m".

I backed up all files on my main computer to another computer just a few 
days ago.  There is a moneydance.md file on the backup computer with the 
same date and time as the moneydance.md file on my main computer.  That 
file also gives me the same error result if I open it from the command 
line with "Moneydance moneydance.md" (a method I sometimes use to run MD 
when I am in the MD data directory).

I have also tried to open older moneydance.md-2009-07-day but all files 
are giving me an error.

Are my files screwed up or is something wrong with Moneydance itself?
How to I open files like "moneydance.md-2009-07-day"?

Larry Alkoff