Notes about the SLX 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 SLX file type is primarily associated with 'FinSafe Terminal XML Smartlet Control'. Also see .SLT. The SLX format is an XML-based format to download a so called smartlet. A smartlet is a small program that runs inside the secure environment of a Finsafe terminal. A smartlet is securely signed.