How to synchronize my file between Windows application and Android application?

The simplest way - use a free cloud service Dropbox.
Here are steps how to do it:

1. Windows: Install Dropbox on you Windows computer from site: www.dropbox.com.
2. Windows: Place your CATC file into Dropbox folder on your Windows computer.
3. Windows: Open and edit your CATC file only in that location.
4. Android: Install Dropbox on you Android phone from Google Play: Dropbox for Android.
5. Android: Find your CATC file in the installed Dropbox application and mark the file as available offline.
6. Android: Open and edit your CATC file only from the Dropbox application by tapping the file from Offline files screen. And don't forget to save your CATC file when you are done editing it (through main menu item "Save").

That's it.

Alternative way.
You can use any popular free (or payed) cloud service like Dropbox, or Google Drive, or One Drive or similar ones along with FolderSync app on your Android phone. Steps:

1. Windows: Install client application of a cloud service on your Windows computer (if it's not already installed).
2. Windows: Place your CATC file into configured cloud folder.
3. Windows: Open and edit your CATC file only in that location.
4. Android: Install FolderSync app or FolderSync Lite app on you Android phone from Google Play.
5. Android: In FolderSync app configure folder pair for syncing files in your cloud folder with a local folder on your phone.
6. Android: Open and edit your CATC file only in that location.

Best regards.