Cannot open XLF file made with Presentation design with Design Personal.

Hello,

I have been preparing for weeks a model with a demo version of Presentation Design (version 6.0.0.0, Build 14.0.2.364). Now my model is ready and validated, but the team wants to post it on the web-site.

So I bought the "upper" version : Xcelsius Engage Version 5.3.0.0

Build Number 12.3.0.670, downloaded today from the online shop.

Then I try to open my model in this new version and I get the following message:

"This file was created with a newer version of Xcelsius (Xcelsius 2008 SP3), and is not compatible with the version installed on this machine. Before you can open this file, you must upgrade to the latest version of Xcelsius."

First surprise, when I download the demo I get the latest version, when I pay for it I get an older release ?!

Then I logged on this site and found a download of Xcelsius Present 2008 Service Pack 5 at this link https://www.sdn.sap.com/downloads/BusinessObjects/xcelsiuspres2008_sp5.zip

I guessed that this was the solution for me (I am a bit confused by the ever changing name of this software, is it Xcelsius, SAP crystal Presentation Design Personal or Present Engage ?)

But the file is corrupetd, I cannot unzip it...

Also in my demo version I cannot save to an older version. So I am stuck. Considering the complexity of the model and the time I spent on it I would like to avoid re-doing it from scratch.

Thanks for your help.