For the record (File creation date configurations) and for those who asked for some basic help in game, here are some suggested steps to help same manage "Normal", "Summer", "Winter", Relto textures options (hopefully; corrections always welcome), at least for a PC with Windows Vista in my case, using "TOC-MOULa Install" as my Client software Installation name. First, know this:-
1) Default TOC-MOUL original installation was probably made in your "Documents" folder, unless you chose to place it someplace else. You can find it's location thread from the TOC-MOULa urulauncher desktop shortcut, if you use one, with right mouse-click and select "Properties"; or just select the shortcut "Open File location". Go to the installation folder to find the "dat" folder and the "Personal_District_Textures.prp" file.
Note it's creation date in folder view. The date will tell you what option you have presently installed (see below).
2)
'Normal' Relto textures file came with your original TOC-MOULa Install\dat\ folder as "Personal_District_Textures.prp" file
dated 10/16/10 (This is the same file and date that you can still find in seperate Client software for MOULa urulive Install\dat folder)
3)
"Summer" Relto textures file were given to us by Filtik at
http://dlc.the-open-cave.net/moul/Personal_Summer_Textures-moul.zip, and when downloaded and unzipped becomes "Personal_District_Textures.prp"
dated 7/4/124)
"Winter" Relto textures file was given to us by Filtik at
http://dlc.the-open-cave.net/moul/Personal_Winter_Textures-moul.zip, and when downloaded and unzipped becomes "Personal_District_Textures.prp"
dated 8/6/13Note that the only File distinction here is creation date (and size), with a common name that Relto build software is searching to use. There must be ONE, and ONLY ONE "Personal_District_Textures.prp" active file in the "dat" folder. This means saving 2), 3), 4), seperately, each under their own seperate folder name say, (Normal Relto, Summer Relto, Winter Relto); removing the active one you have in "dat" folder (save seperately, or delete if already saved as noted); and replacing it with a copy of the one you now want to install from the saved folders, to make a Season change. Then login to admire

Hope this helps.....
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