Newest version is 1.52.  No matter what version you get you can upgrade fairly easily via the online download.  The only way to tell is to turn on both the base and remote.  They will tell you by pushing the CTC button.

You just want to make sure you buy a Legacy System that has software version 1.2 or above. Version 1.1 can not be upgraded by the user.

You have to send the base and Cab2

back to Lionel for a one time upgrade.

Once this is done you can do any subsequent upgrades in the normal way.

legacy is the best so wait. and it is 1.52

I believe 1.1 is user upgradeable, it's only 1.0 bases that had to go in to fix the circuitry in the base (even though you had to return both)

I did not know they could upgrade online.

I did not know they could upgrade online.

MTH pushed them into it!

book mark this site for easy reference.

http://www.lionel.com/GettingS...egacy/legacyHome.cfm

I would wait until the new batch from Lionel reaches the shelves.  Earlier versions had issues with the charging circuit.  A new version would most likely have that corrected.

The software revision in the Legacy unit is not an issue.  As others have stated, Lionel releases the software on their website.  You simply download the software and install it into the base unit and the remote.  To update the Legacy software will require you to also purchase a Legacy Black Module.  They run around 19.95.  Many people buy two but you can do the upgrade with just one module.  These modules are re-usable so its a once time purchase.  You will also need a computer with a serial port.  If your computer does not have a serial port, you will need to get a Serial to USB adapter.  They can be had on Amazon.Com for as little as 10 (it all depends on which one you select).

More likely the cost of mailing out modules was the deciding factor. However I like the downloadable upgrades better, allows for minor fixes that would be too expensive to update and resend modules

And of course, just so we won't get the comments from the Peanut Gallery, you can also create the writable modules from a couple of your existing blue ones from previous updates.

Free Black Modules for Legacy

 Come on you guys. Every one gets credit for helping.

I dragged my feet for a couple of years now. I got a old (but mint) TMCC cab 1 instead just to test stuff. Now I have to learn all this stuff and they release L1 lite version. I've got another option. That should take up another year or two.

 Meantime, I can learn how to use and upgrade this stuff that I still don't have. Hoping Santa comes loaded with extras....

Anyways, thanks.