Error Message: mythic spell bitmap

[radionausea]

I've just started to get this error message:


The data files could not be loaded due to errors. Hero Lab will now attempt to load them in recovery mode. Once loaded, you can access the editor as normal to correct any errors.

The following errors occurred:

Portal 'mythic' - Bitmap file could not be loaded: C:\ProgramData\Hero Lab\data\pathfinder\mythic_spell.bmp
Portal 'mythic' - Bitmap file could not be loaded: C:\ProgramData\Hero Lab\data\pathfinder\mythic_spell.bmp
Portal 'mythic' - Bitmap file could not be loaded: C:\ProgramData\Hero Lab\data\pathfinder\mythic_spell.bmp


I've not changed or updated anything since the last time I loaded herolab and now nothing will load.

any ideas on what is the issue here?