Notes about the JKS file extension:
Incorrect file associations could be the result of underlying issues within your PC system. As such it is highly recommended to scan your PC for invalid registry entries, unused processes and other unfavourable system settings to identify slowdown issues.
The JKS file type is primarily associated with 'keytool' by Sun Microsystems, Inc.. keytool is a key and certificate management utility. It allows users to administer their own public/private key pairs and associated certificates for use in self-authentication (where the user authenticates himself/herself to other users/services) or data integrity and authentication services, using digital signatures. It also allows users to cache the public keys (in the form of certificates) of their communicating peers. A keystore is a storage facility for cryptographic keys and certificates. To actually use the certificates, you must use keytool to export the certificate from the keystore.