so older versions of Gimp cant open xcf's made with 2.10 ??

[mholder]

Export as a .psd and then Gimp 2.8 can open it.  You may lose some functionality.

The same problem should exist with Krita, which cannot open xcf's from 2.10

.psd format is vastly improved from the old plugin.  Gimp 2.8 still has the broken poor .psd plugin, I think.

I'm not sure what will happen with the text info . . .