Latest version of firmware image V1.1.1.16 is here:
http://p2w.pripla.com/stm32flash/V1.1.1.16/Cosmo_firmware-stem_ospi2_1_1_1_16.binLatest version of resources image V1.1.1.14 is here:
http://p2w.pripla.com/stm32flash/V1.1.1.14/Cosmo_resource-stem_resource_1_1_1_14.binBoth images (firmware and resource) are linked from the official update file used b CoDi on:
http://fota.planetcom.co.uk/stm32flash/cosmo_stm32_firmware_versions.txt(Note that on
https://support.planetcom.co.uk/index.php/Latest_Cosmo_Firmware#Manual_CoDi_firmware_update is older version V1.1.1.14 of firmware image, resources are latest)
CoDi Assistant in automatic update mode first flashes resources image (bigger one) and after that it flashes firmware image (smaller one). If flashing any image fails then doing retry start reflashing both images.
In case CoDi Assistant successfully flashed resources image in automatic mode then it is enough to just flash firmware image and no need to reflash big resources again. So in this case it is better to manually flash just firmware image manually via advanced menu.
And as @MarcHover wrote, always store images for flashing into top level storage and not into Downloads directory. CoDi Assistant is unable to read image files from Download directory and crashes.
Hopes this help in situation when flashing procedure successfully flashes resources and repeatly fails in 80% during flashing firmware image.