It seems PDEState only seems to have the one Constructor now:
PDEState(URL[] target, boolean addResolver, boolean removeDuplicates, IProgressMonitor monitor)

The previous constructor used was:
PDEState(URL[] target, boolean resolve, IProgressMonitor monitor)

I am guessing resolve and addResolver are probably equivalent, so removeDuplicates seems like the new option.
I am going to take a wild stab and say removing duplicates is a good idea, so I have set this new parameter to true
The method signature for PluginPathFinder.getPluginPaths is now:
getPluginPaths(String platformHome, boolean installedOnly)

Looking up the comments:
installedOnly - whether to check for a bundles.info or another configuration file to determine what bundles are installed rather than what bundles simply exist in the plugins folder

I took a guess here with false, as I think it is more appropriate to just use everything in the relevant domino plugins folders.
For the ILaunchConfiguration method getAttribute when getting a map it used to be a raw type.
getAttribute(String attributeName, Map defaultValue)

It is now parameterized with String for key and value
getAttribute(String attributeName, Map<String, String> defaultValue);

and I have changed as such.

I have also removed the typechecking and casting as it is no longer needed.