okay, it's another program, but i have been using this for years. it makes renaming of all files and folders easy -- not only for music files but all files ! you can insert number or text anywhere in a file name, trim names, or replace text strings in file/folder names.
the best yet is that it's free and it's a small program. it has to be my most used program for renaming files.
to solve your "." problem, i would suggest replacing all "." with "" in this program. this gets rid of the extra "." in your files, but then you have a problem that all files extensions are missing the "." Because all file extensions are 3 letters, you can tell the program to insert a "." in position 4 from the right. then all files will have a "." between the file names and the extension name!