I'm afraid to do that because I don't know if (even if I don't touch the change altitude tool) it will automatically round up the airport altitude to the nearest centimeter instead of millimeter.
I'm not sure about ADE, because it shows the altitude correctly with 3 decimal points in the Airport properties, but selecting "Change Airport Altitude" use only 2 decimal points. However, you would notice 1 cm difference regarding AI and, as long it rounds up, there shouldn't be any risk of bleeding coming back.
In any case, be careful with ADE because, I've noticed it always save back the file with the "DeleteAllApproaches="TRUE" parameter set, even if in the original .BGL it was set to False, like in most of our airports. If you don't edit it back to false, you'll lose all the default Approaches when saving back the file.
Unfortunately, it doesn't seem to be possible to edit this parameter with ADE (it's always greyed out) so you'll have to configure ADE to keep the XML code when compiling, then edit the XML manually, and compile it back with the MS BGLCOMP program from the SDK. This will also allow you to check what's happened with the altitudes.