Issue with exporting invoices to another currency

Issue with exporting invoices to another currency

I am not able to export to Quickbooks reports for invoices using Zoho Expense in other currency than USD.
I tried to change a base currency in Zoho Expense and Zoho Invoice but that is not possible even after deleting all USD invoices, reports and estimates.

Finally, I tried to change a country of the company but that is also not possible. This is frustrating...

Please help.