I currently have Logos 4.0 (version 4.21.5.0905) on my desktop computer and would like to put it on the lap top I recently purchased.  I have installed version 3.0 from the discs I have on the lap top.  Is there a way to update the lap top to version 4.0? Oh, and is it OK for me to do that?  I'm the only one using the program.   I would like to thank you in advance for your advice.