Hi Toni Graham,
I think the best would be to contact your DocuWare partner or DocuWare Support / Professional Services involved, but I can give you some hints about it. Generally, updates from 7.2 should be straight forward, but as always you should have a good working backup before trying a change.
1) From 7.2 to 7.6 you can go in one step. This is also documented here:
http://help.docuware.com/#/home/87143/1/1
2) This can be found in the system requirements: https://help.docuware.com/#/home/55049/1/1
3) This is, if you have changed and DocuWare config file manually. This is sometimes advised by DocuWare support in special cases. If you have never changed a config file manual, than you do not have to worry about it.
4) Yes, license files are version dependent. If you have a running support contract, you can get a new license file. A new license file can be created by your DocuWare Partner or DocuWare Support.
Why are you considering version 7.6 and not the most recent version 7.7?
--
Tobias Getz
Team Leader Product Management | DocuWare GmbH