Flashtool 0.9.18 Best -

Upon completing a firmware download, the tool could automatically open the FTF bundler to package the files into a single flashable image.

Software evolves, but not always for the better. Later versions of FlashTool (0.9.19, 0.9.22, 0.9.23, etc.) introduced support for newer Xperia models (XZ series, XZ1, XZ2). However, they also brought changes that some advanced users found undesirable: flashtool 0.9.18