I notice that if country settings are set to "," as a decimal separator weight and balance coordinates of the envelope are messed up as the coordinates separator is also a "," I live in Holland and we use a "," (comma) as a decimal separator

This is entered initially:
205,669,205,720,410,980,564,980,564,669,205,669

This is how it looks like when I edit the W&B coordinates:
205,00,669,0, 205,00,720,0, 410,00,980,0, 564,00,980,0, 564,00,669,0, 205,00,669,0

This is how it looks like if I edit the data again:
205,00,0,0, 669,00,0,0, 205,00,0,0, 720,00,0,0, 410,00,0,0, 980,00,0,0, 564,00,0,0, 980,00,0,0, 564,00,0,0, 669,00,0,0, 205,00,0,0, 669,00,0,0

Looks like every item is converted to a decimal format (with 1 or 2 decimal places)

Am I doing something wrong or is this a bug ?

Skydemon Version 3.3.1.0

What do you mean with "locale"?

Found locale but those settings are ok. 

The strange part is that on my laptop the problem does not occur (tested yesterday evening)

After checking if there were any differences between my laptop and my PC I found the problem:
on my PC the list separator was set to "," instead of ";"

All is running fine now.

Switching off :-))