There was one other change in v5 whereby the AceXML version changes to 5,0.
<SimBase.Document Type="AceXML" version="5,0">
This is pretty much unimportant to the operation of the gauges but I've updated that just in case in 26b:
Preview 26b interim version:
Ideal Flight Professional P3D v4/5So now the plan output is strictly identical in P3D v5 and Ideal Flight.
(If this interim version becomes unavailable, that will be because Preview 26 proper is uploaded and will be found in the normal locations.)