I checked in the location you suggested and found these logs. Admin PC where Standalone is installed I looked at the following path to find logs. C:\Users\Administrator\AppData\Local\VMware\VMware vCenter Converter Standalone Client\Logs. On the Physical PC I looked under C:\Users\User1\AppData\Local\VMware\VMware vCenter Converter Standalone Client\Logs.
Also, I am not using the VMware Server/ Client Setup just and FYI. I am using Standalone.