Hello. i have just purchased the 757 300 expansion (csx 573_1700 exe), iam trying to install and an NSIS error launching installer appears. I copy-paste the exe to another file and things work, BUT after i press "I Agree" on License Agreement i get the message that "this update requires the latest version" and adds "required version 1600" although i have the 1700. Then i follow the link to download the latest version which is the same with the one i have already downloaded. I also re installed base pack from "extended download servise" as i have done with the extension. Then again the same problem when trying to install the extension. It will guide me again to download latest version and the installer will close. All antivirus are disabled and i have succesfully installed 757 base and 777 which i also just purchased . So the AV is not a problem. I am sending a photo of the installer message.Can someone help? Thanks a lot.

Thanks for the reply. However i didn't see a way to solve the problem from the content of the link. Can you tell me more specically what needs to be done?
I appreciate a lot.....

Alex T wrote on Dec 24^th, 2021 at 2:19am:

It is (csx is the designation for FSX/SE/P3D3), so it should work unless he has the P3D4/5 version of the 757 Captain III (757-2PW) Base Pack 1.7 [P3D4/5] (csy572_1700.exe).
I have to assume he knows it's for FSX/SE/P3D3 because you can see it on the image of the installer error.

ZISIS wrote on Dec 23^rd, 2021 at 4:38pm:

https://www.captainsim.org/forum/csf.pl?num=1489697628

Hello again. Iam sorry to have found no response regarding my problem on installing 757 300. According to photo attached, version 1600 is required. So is there a way to get version 1600 and try to see what happens? Thanks again.