Graphical Analysis version 4 created .ambl files. These files can be opened by Graphical Analysis and Logger Pro.
In the fall of 2020 Graphical Analysis version 5 was released, alongside the first release of Graphical Analysis Pro version 5. These apps write out .gambl files in order to support new video features.
Graphical Analysis version 5.x can open files in format .ambl, .gambl, and .smbl. .smbl files are from Vernier Spectral Analysis, and .ambl files are from older versions of Graphical Analysis 4.x.
Graphical Analysis version 4.x apps can open .ambl and .smbl files. They cannot open .gambl files as these older versions lack video support.
Upgrade to version 5.x of Graphical Analysis to open .gambl files.