Well, I have kept calm and pulled the trigger. Unfortunately the gun was loaded with blanks!
I tried to download the Avast antivirus. It came back with a message that the laptop needed at least XP3 so that was a fail.
I have re tried the gaining access to the t-bar-mg.com website on the old laptop that I would use for this purpose and it returns a message telling me that t-bar-mg.com's server address could not be found!
I re tried the download that I previously copied across from my windows 11 desktop pc and just as before I cant get anything to work.
I have (or it shows) a zip file RaveBNodate. If I attempt to pent that zip file it shows me a number of files identified as follows i.e. Acrobat 4, indexes, MG Rave Tutorial, pdf, tsb, Autorun, MGModels (pdf), MGselect (pdf), RaveMG, Rave-rc, RCModels (pdf), RCselect (pdf), README (Text document), TData, TData (text file).
If I open the pdf file (called pdf) it takes me to options for various rover vehicles ~ one being the TF. Attempting to open any one of those pdf documents that are then revealed tells me that "no updates available at this time".
So I clearly don't know what I am doing wrong and have not had any message relating to tdata.exe this time.
Looks like I'm "up effluent creek in a barbed wire canoe and without a paddle"
Tried and failed!