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zengyro: Last week, I purchased the Vegas DLC and downloaded via the manual install links. However, I cant install the DLC because the primary game is marked as version 1.5.1 and the DLC installer is still on So the GOG installer cant install it because it sees the main game as the incorrect version.
Hey! The 1.5.1 version of both installers should be available for download. Could I ask you to try downloading and installing these, and let me know if you run into any issues?

Cheers :)