Since you didn't share any details, not even what Hybrid version you are using, I had to search a bit to find where 'GrainFilter/RemoveGrain' was used on non-Windows systems.
-> it's a bug in DeSpot, don't use DeSpot and you should be fine.
-> it's a bug in DeSpot, don't use DeSpot and you should be fine.
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Dev versions are in the 'experimental'-folder of my GoogleDrive, which is linked on the download page.
Dev versions are in the 'experimental'-folder of my GoogleDrive, which is linked on the download page.