I looked at the image you posted. I noticed your code was setting a license in Main(). I had forgotten to do that in my test application, so i tried it but license i have doesn’t allow me to use new version 19.3.
Failed to set license. Details: The subscription included in this license allows free upgrades until 03 Sep 2018, but this version of the product was released on 28 Mar 2019. Please renew the subscription or use a previous version of the product.
When i use my current version of dll (220.127.116.11.), i still get error "The ANSI file version editing is not implemented.” If i try new dll without setting license, i still get error “The ANSI file version editing is not implemented.” I have downloaded trial version of 19.2 and 19.3 to test, but no luck. Is there a license file for trial version i need from Aspose?