In my opinion, the first thing to do is Save/Update your custom Workspace (Tools / Customizeâ€”â€ºOptions" page), if you have one. If not, create one by overwriting the current name in the "Save In" list with a unique name and click on the "Save In" button. This will save how your Toolbars, Menus and Palettes are setup, your Workspace, nothing else. I have never found it necessary to save a copy of the "Config" folder (C:\Users\your user name\Documents\TurboCAD Professional 18\Config), as the only items that may be changed are the company supplied files. User files are not touched.
One item that you may want to save is a copy of your INI file in the Built-In folder (C:\Users\your user name\AppData\Roaming\IMSIDesign\TurboCAD\18\Professional\Profiles\Built-in), which is normally Hidden by Windows. The file name is "TCW18_XML.ini". Do not save a copy in the Built-In folder, I usually place a copy in the "Profiles" folder one step above (easier to find). After the Update has been run and you start TurboCAD for the first time, everything in the "Built-In" folder will be destroyed and replaced by new files. Once TurboCAD has been shutdown, replace the new INI file with a copy of your Copy that's in the Profiles folder. To un-hide hidden files, go to Windows Explorer and go to "Tools / Folder Optionsâ€”â€ºView" page and check the radio button for "Show hidden files and folders".
Restart TurboCAD. You'll have most of your settings, but now you need to load your Workspace. Go to the "Tools / Customizeâ€”â€ºOptions" page", select your custom Workspace from the "Load From" list, then click on the "Load From" button. Your Workspace should load up to what you had before. OK out of the Customize dialog. You should be back to where you were before the Update.
Your LightWorks items are not touched in an Update or reinstall. They are located in the same area as your INI file. Their folders are Luminance, Materials, RenderSceneEnv and RenderStyles.
The addresses I gave you are for Vista and Window 7. For XP, look at "C:\Documents and Settings\your user name\Application Data\IMSIDesign\TurboCAD\18\Professional\Profiles\Built-in
Designer, Deluxe, (Basic, Expert, Professional), Platinum
Windows 10 Pro (1909), 64-bit