Gnucash path problem.

I have a problem with gnucash portable.

My USB drive gets assigned different drive letters on different computers, but gnucash always looks for the data file based on the drive letter from the last computer I used.

Is there any way to set a relative path?

Edit:

Working with the awesome online support people

I found out that if the data file is stored in the default location [USBDrive]:\PortableApps\GnuCashPortable\Data\Profile\[data], GnuCash finds the file no matter what the drive letter is.

If, as I prefer to do, I store the file under [USBDrive]\documents\gnucash\[data], gnucash will always look for the file based on the last drive letter assigned to the flash drive in the last computer I used it in. For example: When I'm at work, the data is saved as E:\documents\gnucash\[data], then when I come home and plug my drive into my computer I get "The file E:\Documents\gnucash\Finances could not be found." because the USB drive is assigned the G: drive letter.

It works using the default location. I just don't like the idea of storing data under the application folder- it makes backing up more complicated... I've lost many files that way in the past.

Thanks in advance for any help you can provide!