Remote Desktop Manager not usable

Hello,
after updating to the latest version of the software, I’m no longer able to use it.
All the connections I had configured over time are no longer available, and I cannot access the import feature because it opens an empty page (see attachment).
I have already tried uninstalling the software and reinstalling previous versions (2025), but the issue persists.
Could you please provide support on how to resolve this?
Thank you in advance.