PPSSPP 1.4 DX11 crash

[LunaMoo]

You probably lack required shader compiler for DX11 as win 7 comes with outdated one.
Either use installation version(which I think does include it by default) or download dll's for version you're using from here and place it in PPSSPP directory.

You could also place those into your system, but while those files are redistributable, microsoft doesn't offer them in any separate installer and recommends shipping apps with the dll's instead of installing those into the OS.