The following bug has been logged on the website:
Bug reference: 8565
Logged by: Alessandro Suzzi
Email address: ale.suzzi@tiscali.it
PostgreSQL version: 9.3.1
Operating system: Windows 8
Description:
When PostgreSql will be uninstalled, it have to delete all registry key.
When I try to reinstall it, in PGAdmin I see all the version I have
installed.