Given the number of releases in between Enterprise Miner v5.3 and Enterprise Miner 14.1, you are probably best-served by creating a new project in the recent Enterprise Miner release, and building a new diagram instead of trying to convert something that old. But if you really want to try here are some suggestions and information.
Remember what you are attempting is not really supported. But lots of people have attempted this for reasons only they understand.
If your v14.1 image is on the same operating system as your v5.3 image you may be able to open the old project in 14.1 using Create new project with the name of the old project. That process is covered in some detail at...
http://support.sas.com/kb/32/904.html
and
https://communities.sas.com/t5/SAS-Data-Mining-and-Machine/Copy-Enterprise-Miner-Projects/m-p/99819#...
However, since 5.3 was so long ago you probably need to migrate the old project from a 32 bit system to the the new 64 bit system. Information on this adventure is available at ...
http://support.sas.com/kb/32/905.html
