To clear Attaché Application Cache, follow the steps below:
On your workstation, close out of Attaché Software.
Open File Explorer.
On the Address bar, type %localappdata%
Rename the folder Attache Software Australia Pty Ltd to Attache Software Australia Pty Ltd Old.
Open Attaché as normal. It will take longer to load the program as it re-builds the application cache.
📌Note: You won't lose any personal data doing the above, it just refreshes system files.