Month -1 help

[winnebago]

I'm having really good luck with the BRC command line utility but I could use a bit of assistance if someone has any advice to give.

Here's my command:

brc32 /pattern:"lbqx.zip" /appenddate:N:S:::10:%m%y /execute

It renames a single ZIP file with the month and year. I need to do the same thing but one month prior. In this case it appends 0610 to the end of the file. I would like to append 0510 instead. Basically month -1.

Any ideas?

TIA!

[Admin]

Try running another BRC command after the first one which replaces 0610 into 0510.