V10 Program displays some message characters as garbage

1

Gmail displays:

image
image1001×161 7.74 KB

in a message which once exported from Gmail (via Takeout) and via .mbox reloaded in eM Client is displayed in preview and message window with garbage characters:

image
image441×649 13.5 KB

Message source says Content-Type: text/plain; charset="iso-8859-1"

Any solution?

Thanks.