Steps to reproduce this issue

1. Open connection manager, no connection entries should be present
2. Click on New to create a new connection entry.
3. Select Connection type PostgreSQL (TCP/IP). The dropdown Library` remains empty:

4. Click on button Open to connect to server. A misleading error window pops up:

Possible solutions

• present a default value for PostgreSQL library inside the dropdown
• programmatically check whether PostgreSQL library is given inside the dropdown menu. If not, show an appropriate error message insie an error popup window.

This issue prevented me from having a smooth first user experience when using HeidiSQL to connect to a PostgreSQL database. Thanks for providing such a helpful tool!