Having downloaded and installed the Eurolatin Keyboard, that’s fine; and the package and ‘internal’ documentation refers to it as 1.7. But the source file (from tavultesoft.com/eurolatin/ ), and ‘external’ help file (pdf), from, e.g. www.tavultesoft.com/keyman/downloads/keyboards/details.php?KeyboardID=348 ) are both still for 1.6.
Yes, this keyboard is on our list to move to the open repository. Once we have done that, then the versioning will stay in sync. However, the changes between 1.6 and 1.7 are not too dramatic, so I think you should be fine working from the 1.6 version if you are wanting to adapt it.