Not able to open app in interact mode.

I have uninstalled and reinstalled IB4 twice.  I am not able to view app in interact mode.  I read some of the other suggestions about looking in the app folder for a folder called player and I do NOT have a player folder.   This is so frustrating.  I have also tried to install the builder on my imac and it will not allow me to use my email addy to do this.  Tells me I already have it.    I deliberately took time off from work this week to get the book I'm hoping to release before Christmas submitted but feel frustrated at this point.   Please advise