Re: How can I know witch version of Relex generated a file?
it makes no difference which of the currently supported versions (Relex 7.7 (~year 2005) ..... WQS 10.2 (latest version)) you install.
The crucial point is rather which Relex version you have used in the past. If it was 7.7 or later, just use the conversion wizard that is supplied with all supported versions. If it was earlier than Relex 7.7, then contact PTC support.