Could you detail how you added the +19V symbol?
Does the same happen in a fresh project?
Do you get any error message when opening eeschema?
What KiCad version are you on?
If you are on version 5
In general, you will get the pspice library in the “add power symbol” dialog because it contains a symbol marked as “this is a power symbol” (The symbol for the pSpice reference voltage “0”).
The inbuild power lib also contains symbols made this way which means it should also appear. However, if you have a library in your project lib table called “power” or if you removed the “power” library from the global library then you will no longer get it in the dialog.
Further reading:
- Library management in KiCad version 5
- Tutorial: How to make a symbol (KiCad v5.1.x) (section " Creating a custom power port (power symbol or power label)")
- Creating a new symbol library and a new symbol in KiCad 5
And as a beginner you might want to take a look at Tutorial: Introduction to PCB design with KiCad version 5.1 (Getting Started)