Notes about the RXR 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 RXR file type is primarily associated with 'Reflex' by Borland Software Corporation. Reflex is an old DOS flat-file database system. The size of the database was limited to the amount of system memory.