Changing the Danube Course - AK-INK

[pinheirohr]

Fellow fans,

I’m trying to change the Danube river course, so that Ak-Ink is situated on the right bank.

I’ve deleted the map file,
Edited with GIMP the features tga file
Started a new campaign ,but there are no changes in the map.

I’ve also tried more complex solutions, like changing the settlement site and the region borders on the regions tga file.
The result was the same….no changes on the map.

Is there any step I'm missing?

Thank you!