@Benard Bill 

It seems your file is indeed corrupted as you expected. As a workaround, use the Online Tool to convert your data directly to QBO. You don't need to bother upgrading your QB Desktop version.

https://quickbooks.intuit.com/learn-support/en-us/help-article/company-file/quickbooks-desktop-file-...

If the tool failed to convert your data, you don't have any choice but to fix your company file first. Contact @Fiat Lux - ASIA and ask them to fix it. They won't mind refunding your payment in full if the damage is too severe.