I don't have admin right so I install IDEA to a local directory.
When I get a new EAP it asks me to uninstall from that directory then subsequently asks me to install in Program Files.
Can you make the installer use the dir from the previous installation?
I also have limited network storage so I modify the idea.config.path and idea.system.path to c;/tools/JetBrains/.IntelliJIdea13
However, this doesn't get picked up each time I install a new EAP and if I forget to update them the cache uses up all my network storage.