You need a .reg file or a launcher that tells the EXE to look locally. The easiest method for most users is to use a free tool called or PortableApps.com Launcher to repackage the EXE. Alternatively, create a start.bat file in your USB root with the following:
: Users can export games from a standard database to a portable format by selecting games, right-clicking, and choosing Selection to Textfile Header Management chessbase 10 portable