Updating projects created in MaterialsStudio 23 to MaterialsStudio 26

Hello MatStudio community,
I want to update to Version 26 to take advantage of the new features including python scripting and scrolling in script documents.
When opening old projects (created in MatStudio 23), I get prompted to convert project settings to the new version.
This conversion does not work for any projects containing any folders, the program just freezes/crashes.
Copying old folders into a newly created project also does not work, folders don't show up at all.
Incremental upgrades (23 to 24, then 24 to 25, then 25 to 26) don't work either, the conversion between 24 and 25 fails.

Can I do something to convert these old projects to the new version outside of opening them in the new version?

Thank you for any possible solutions to this.