Hello, can you provide more information about the issue? What happens exactly when you try to export?
Older versions are available from Pixelorama's GitHub page, you can get 0.11.4 here: https://github.com/Orama-Interactive/Pixelorama/releases/tag/v0.11.4
Just keep in mind that pxo files, palettes, shortcut profiles and layouts saved with 1.0 cannot be opened by older versions. Extensions made for 1.0 also do not work in older versions, and vice versa.