I have run this stage before through RSCenter and it worked ok.  Now everything I run it via RSRBR it just crashes and retuns me to the RSCenter window.  I have re-installed the Track Packs but it is still failing.

I'm presuming I need to un-install RSCenter and re-install it.  Can someone explain how to do this ?

Download and launch this utility of repair. utilitaire de dépannage de RSRBR. (DepannageRSRBR.exe)
Once launched, click the lower left button "Analyse simple".
Once the ended analysis, selects nothing, copy nothing, return directly here to post a new answer.
In the text field, make a right click and chosen "Paste".

You can put a comment following the report of analysis.

Thanks for the response but late last night the problem was solved.  I had selected 'covered damp' as the conditions for this track in RSCenter but it seems that this condition isn't supported for this track so it failed.  I loaded another condition and the track loaded and ran ok.

I suspect that you have probably missed this setting when you released the tracks in 2012  

After verification.
This is not the case. Covery Damp is OK on Puy du Lac

Someone else on the RD forum has said that they run 'covered damp' offline without problem and someone else says it isn't available online.

IIRC aren't the weather conditions held in different folders/files and I'm just wondering if I restore the 'covered damp' ones then I may get it back.  It still works ok in the replay that I have and that makes it even more confusing (unless the texture files are stored in the replay).

When you load a replay, RBR will look in the game files the required conditions. The replay contains information to get these conditions, but it does not store these conditions. This is the files that are used RSRBR

Puy du Lac , Covered Damp runs ok off-line, but the only weather that can be chosen for On-Line is Good Conditions and Cloudy dry. The others are not selectable when setting up a Session.

Yes, You are right

Unless I am mistaken, Puy du Lac still programmed in good conditions only in official sessions, not even in Cloudy.............

I can select Cloudy in Public Session Setup.

This is getting a bit off topic as my original question was because this track wasn't functioning correctly in RSCenter how can I reinstall RSCenter so I get this track back functioning correctly.

A relocation will not solve your problem.
This can be done only internally.
The creation of this special, it was only in Good, changes for the passage to Bad ... caused bugs for some drivers and are not scheduled in the sessions.
Sessions = Official sessions > Championships Rallyesim