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Find the file you want to upgrade

Already using the new, online-enabled, AccountRight? This topic is for company files being upgraded from the older AccountRight v19 version. So if your company file is a .myox file, it means you're already using the new AccountRight. So all you need to do is install the latest AccountRight version, then open your company file and you'll be prompted to upgrade.

Need some help finding your AccountRight Classic (v19 or earlier) company file to be upgraded? Here's some tips.

Use the Windows search tool to find your file

The quickest way to find your AccountRight company files or backups is to use the Windows search tool on your computer.

Keep an eye out for files with a .myo file extension (the 3-letters after the dot at the end of a file's name). This is the file extension for AccountRight v19 files, such as My Company File.myo. Some older software versions might have a .prm or .dat file extension:

If looking for

the file extension is

for example

a company file


.prm (Premier v8/Premier Enterprise v3 or earlier)

.dat (BusinessBasics v1, Accounting/Accounting Plus v14 or earlier)




a backup file


Note that you'll need to restore a backed up file before you can upgrade it. See the restoring your file help topic: Australia | New Zealand.

If you can only find a .MYOX file, it means it's already upgraded. Learn how to open a company file.

To search for your file

  1. Simultaneously press the Windows ( ) and E keys on your keyboard (the Windows key is between the Ctrl and Alt keys). The File Explorer appears.

  2. In the left panel, click Local Disk (C:).

    local disk
  3. In the search box (in the top-right corner) type *.myo (if you're looking for company files) or *.zip (if you're looking for backup files).
    The asterisk just tells Windows you're looking for everything that ends in ".myo" or ".zip".

    asterix search myo

    Depending on what you searched for, all files with ".myo" or ".zip" will be displayed. The file location will also be displayed.

Using Windows 10? Learn more about your searching options.

Other ways to find your file

  • Check the installation folder of your previous version (for example, C:\Plus19 or C:\PlusClassic). Most files will be here.

  • If your company file is open, you can find out where it's stored by using the Company Data Auditor (Accounts command centre > Company Data Auditor).

  • Check your network drive or any portable storage devices.

If you need more help finding your file, see our AccountRight v19 support note Finding AccountRight company files and backups.

After you've found your file

If you're: