The procedure for uninstalling fwbackups is the same as the installation procedure, with one important difference. Instead of issuing "make install" as root to install fwbackups, use "make uninstall" instead.
For most systems:
tar xfj fwbackups-1.43.6.tar.bz2 cd fwbackups-1.43.6 ./configure --prefix=/usr make su -c "make uninstall"
On the last command, you will be prompted to enter the root password. If your system uses sudo (for example Ubuntu and Mint), simply use "sudo" in place of "su -":
tar xfj fwbackups-1.43.6.tar.bz2 cd fwbackups-1.43.6 ./configure --prefix=/usr make sudo make uninstall