[vbat99]

How can I rename a file im MM? E.g. an episode, a movie.

Media Companion has built-in renaming conventions. For TV Episodes look at TV Preferences, right side called " Tv Episode renaming settings" and select which you prefer.
Then in Tv Browser, right click the show, or a season or a episode and select "Rename Episode(s)"

For Movies, nameing convention is in Movie Preferences -> General tab, in the centre.
In here you can see Folder Renaming and Movie Renaming during AutoScrape. The Legend is listed on what you can set for your naming of either the folder or the file.
You can select to rename during scraping, or, below these options is the option "Enable Manual Movie Renaming". This option can be selected either by itself or with during scrape.

I usually recommend to select only Enable Manual Movie Renaming, and once the movie(s) have been scrape successfully, you can right-click a movie or movies (yes, you can select more than one movie - called MultiSave Mode) and go to "Rename Selected movie(s) in list" where you have the options

• Movie and Folder
  
• Movie Only
  
• Folder Only

If a movie is in the root of the movie folder, and one of the Folder renaming options is selected, then the movie and associated files (including actor images) are moved into a new folder created as per your selected naming convention.

Finally. Naming convention for Folders has one extra option. You can create a Set folder, with a Sub Folder for the Movie selected.
Example: If you have Back To the Future 1, 2 &/or 3, and these are in the Set "Back to the Future Collection".
If you have "%N\%T (%Y)" in the folder renaming, Notice the \ between %N & %T, this will create the following folder structure:
<rootmoviefolder>\Back to the Future Collection\Back To The Future 1\<movieandartworkfiles>
<rootmoviefolder>\Back to the Future Collection\Back To The Future 2\<movieandartworkfiles>
<rootmoviefolder>\Back to the Future Collection\Back To The Future 3\<movieandartworkfiles>

Hope this helps some.