Odds are you may be out of luck. If you have an old installer somewhere then you could use that, but Adobe doesn't provide access to historical versions. The exception is usually if you had purchased it through a program that gave you access through http://licensing.adobe.com/, as all your past purchases would be available there. But that is probably a long shot.
Could you use the trial version of Presenter 11?
In case you purchased Adobe Presenter 8 from Adobe.com, then you may access the download link from your account using the below instructions:
- Login to your Adobe.com account by visiting http://www.adobe.com/ and clicking the Sign In link at the top right corner.
- Now Sign in using your Adobe ID
- Click Manage Account
- Click View your Orders
- Click your Order number for the desired product
- Scroll down and click on the Download link. This will take you to the product download page with download link to your product version.
Please try this and let me know in case you do are unable to locate the product under your account and we will try some other way to help you.
Bingo. Thank you Sharad.