PS/SQL Developer initialization error with missing DLL files

Hello experts,
This is the error that I have it when I want to launch the program. It worked just fine before the reinstall of my Windows and now I cannot solve this. Can anyone help me please to fix this error ? Why it doesn’t work now ?
Thank you !

Initialization error
Could not locate OCI.dll
OracleHomeKey: SOFTWAREORACLEKEY_OraClient11g.home
OracleHomeDir: D:appaneesh.thilakanproduct11.2.0client_1
OK
