I'm a big fan of fastcopy and it plays a primary role in my home back plan. I work with lots of images and Adobe Lightroom. Lightroom like to create cache files and preview files all over the place and I'd rather not back those up (since they can be re-created). I was struggling to get the Exclude filters setup correctly in fastcopy, but now that I have them working right, I thought I'd put some samples out there for anyone looking for help. Hope someone finds it helpful and it saves you some time!
Filter for a specific file:
previews.db
Filter file name with wild card:
*.lrprev; *.lrcat
Filter for a specific folder:
$RECYCLE.BIN\; (note the "\" on the end, this tells fastcopy you're filtering a FOLDER)
Filter folder with wild card and spaces:
*" Previews.lrdata"\; (This tells FastCopy to filter for any FOLDER that ENDS WITH " Previews.lrdata")
The above filter would exclude/include the following folders:
...\Lightroom Catalog Previews.lrdata
...\Lightroom Catalog-2 Previews.lrdata
...\Lightroom Catalog-3 Previews.lrdata
*"Smart Previews"*\; (This tells FastCopy to filter for any FOLDER that has "Smart Previews" anywhere in it's name)
Folders (and any files in those folders) that would be filtered include:

Hope that's helpful!
And a THANK YOU to Hiroaki SHIROUZU for the great piece of software!