Doc-To-Help Source and Target Templates are stored in:
•Windows® 7/8 and Vista at C:\Users\ (user name)\AppData\Roaming\Microsoft\Templates
•Windows XP at C:\Documents and Settings\(user name)\Application Data\Microsoft\Templates.
If you uninstall Doc-To-Help and reinstall a newer version, the templates will remain in that folder. However, if one of your customized templates uses the same name as one of Doc-To-Help’s default templates, and there is a newer version of that template in the installation, Doc-To-Help will save your version of the template to the \\Program Files [or Program Files (x86)]\ComponentOne\DocToHelp\Backup\Templates folder.
The Application Data or App Data folder is a hidden folder. To show hidden folders, open the Folder Options dialog box in your operating system (Control Panel > Folder Options). Click the View tab, under Advanced Settings > Files and folders > Hidden files and folders, select the Show hidden files and folders radio button. Click OK.
For more on Doc-To-Help Source and Target Style Sheets storage, see HTML File Style Sheets.