New Lightburn doesn't fully work

Hello- after upgrading Lightburn, I opened a file and found that choosing Preview led to the spinning wheel of death on my iMac. Could not force quit so switched off, then on, and repeated the whole disaster three times. Took the usb to the shed and loaded the same file onto a windows laptop which is joined to the laser.
Again the preview would not load, and I got the spinning blue circle of death. Restarted and tried to run the file, but nothing happened at all.
The Lightburn software on the shed windows computer had not been updated…
Have I corrupted the file?

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