thanks for your reply.
Yes from a new project it works correctly. Also it worked with our project. But at one point, where the project went very complex, it was not possible to save changes we made in the inspector.
Project is on the way now, all good. But this morning I have checked the issue again:
Definitly I can't save changes we make in the inspector view of vuforia objects. Can't save the actual licence key. Can't save changes we make in the ImageTargets in DataSets and or TrackerImages via Inspector.
Changes in all other GameObjects we make in the Inspector saves as expected.
Last two weeks we didn't change so much in the vuforia section of our project. But if we needed to change the dataset of the markers, we was first time faced with this problem.
We deleted all ImageTargets from the Project with, added new Prefabs, set the databased saved and it worked. But next time, we tried to change and save it does not work.
We are working on more projects with vuforia - and these projects saving changes in vuforia objects as expected - but these are not so complex.