I have Plus and Retail installed
Can they both use the same Local Folder for access to downloaded content from DLS so I only have to down load items once for all builds
If you have things backed up, you have got nothing to worry about. Give it try and let us know what the results are. Otherwise, don't do it without backup.
By mistake, I had 2 Trainz programs using the same data folder. Caused multiple rebuilding events, incompatible saves. Not worth saving disc space nor download time!