FYI: A user on the "Imacon Scanners" Yahoo group (mristuccia) have found this workaround which makes it possible to open the 3f file:
1. Open Photoshop CC 2018
2. File -> Open... (as usual)
3. Click the button "Options" in the open dialog (bottom left)
4. Select the .fff file you want to work with
5, Now you should have:
Enable: All Readable Documents
Format: Imacon 3f
6. Click on "All Readable Documents" and JUST RE-SELECT it from the option list, or select another option and then re-select "All Readable Documents".
7. Click the button "Open" (as usual)
The thread can be found here:
https://groups.yahoo.com/neo/groups/IMACONUSERS/conversations/topics/12453
I have also posted this message at Adobes Photoshop Feedback forum (
https://feedback.photoshop.com/phot...hotoshop-cc-2018-imacon-3f-plugin-not-working)