Hello,
The lib and sym files under "Program" are not used by LTspice.
The real directory used by LTspiceXVII is in the personal folder "Documents".
If a symbol is copied in this path, it's shown in the component selection without setting an extra path.
C:\Users\Helmut\Documents\LTspiceXVII\lib\sym?
C:\Users\Helmut\Documents\LTspiceXVII\lib\sub
Best regards,
Helmut
