Test your repaired content after changing the trainz-build number.Be aware that doing this work successfully can often be a bigger task than actually fixing whatever the error originally actually was. The more this number changes, the more update work must be done to the asset to make it work at the new version number. You will likely need to increase the trainz-build version number in order to meet the 'minimum requirement' level for the DLS, currently 2.9.You must increase the KUID2 version number of the asset by precisely one version.You might find someone else is already working on the asset you want fixed. Also check to see if someone else has already claimed it.If you do decide to repair an asset, there are some things to bear in mind:

You can find some documentation about the process on the TrainzDev Wiki. The Download Station Cleanup process allows a trainz user to repair assets created by other trainz content creators on the DLS. This may be particularly important for a content creator wishing to use that asset in their creation. If one of your favourite assets is faulty when downloaded from the DLS, you may wish to repair it and provide that repair to others.

Trainz 12 fix thomas content