Remove previous failed installation of Presenter 10

In the (first) process of installing Adobe Presenter 10 something went wrong - and upon subsequent attempts to install I get the following error message (translated from Danish):

"On this computer there is a betaversion, or a version of Adobe Presenter 10that causes a conflict. The version that causes the conflict must be removed before you can install ..."

I have deleted the Presenter folder, run a registry cleaning program (RegHunter) and rebooted - but to no avail.

Can anyone tell me have I remove whatever prevents me from (re)installing (for the sake of good order, I do have the license number).

Thanks & cheers ----------/Ivan