Press Ctrl + Shift + F or click the red Adblock Plus icon and then
Filter Options to open the filters window. Now you can do one of the following:
If you have only a few filters.
Select the filter you want to backup and press Ctrl + R or click on the
Actions button and then
Show/Hide Filter. Then click Ctrl + A to select everything and Ctrl + C to copy. Paste it to pastebin or any other website or to a text file and save it on a flash drive or something. Create a new filter on the other computer and simply paste what you backed up on pastebin.
If you have a lot of filters.
In that same filters window, click Ctrl + E or go to
Backup and Restore > Create new backup to create a backup copy, save it on a flash drive, upload it whatever, and on the new computer, on that same filter window, click Ctrl + I or
Backup and Restore > Load file to select a backup file - load the file you saved and that will load your previous filters. Just make sure you do this both under the regular
Filters tab and under the
Custom filters tab.