9.1 keeps upgrading file every time I open it

[jwilhelm]

I opened a file in 9.1 and saved it, but each time I open the saved file it upgrades it,
whats up with that?

[Zig]

Are there any linked files associated?

[Chad Smith]

What Zig said. If you have linked files, these need to be upgraded separately.

[jwilhelm]

yes that must be it, thanks