Whenever I open a pdf file with PDF X-Change Viewer it locks up the source pdf file to edits. Is there a way to open the pdf (with PDF X-Change Viewer) so that it doesn't lock-up the source file --- perhaps as a shell command with an option? The background: I use LaTeX to edit my pdf files, and preview the result with PDF X-Change Viewer. I must first close PDF X-Change Viewer before I can preview any changes I make in the LaTeX source. It would be nice if PDF X-Change Viewer did not lock-up the pdf source so that I could modify it without first closing PDF X-Change Viewer.