Firstly HeidiSQL works well under Wine on Linux and allows me to administer various MySQL, PostreSQL and occasionally MSSQL databases with various connection methods.
Recently I allowed the usual upgrade process to install an update which was to v9.3 later I discovered the connection Network type PostgereSQL had vanished. Checking an install under Windows 7 running in a VirtualBox and it was still there.
I installed the 32bit version explicitly under Wine and the PostgreSQL Network option was restored and works! This may be a Wine issue and not anything that the Heidi 64/32 installer can fix?
I'm posting this for others who use Heidi under Wine who run into this problem.