Suggestion: Please add the ability to configure which directory the app downloads the filter list to.

[KirkH420]

I think that the settings panel should have the ability to change where the filter list is downloaded to. Especially since you're offering a portable version. There is a PortableApps.com version of qBittorrent that is capable of running without leaving behind data in the User\AppData\ directory for example. I like to keep IPFilter in qBittorentPortable's directory and it would be very nice if it could write to this same directory, to keep everything contained.

Why not just add a textbox "Download to:" within the options panel with a Open File Dialogue along side of it? C# definitely has OFD api already built in, so it'd really just be about one block of code and then like 2 lines to add the GUI objects.

Logic:
It doesn't make sense to have a portable version that's writing to the AppData\Local directory. True portable applications should be writing to the directory where the executable is being launched from.

[oghaki]

I think this would be a great option. I actually modified it at one point and re-compiled just to get this to work. A simpler option for anyone in the meantime would be to write a simple tool to run ipFilter, wait for the new list to appear in the default folder, then copy it to the desired location.

[FaceCrap]

2 years later and this is still on the wish list.

OT: But the OP uses the wrong logic... on the one hand suggesting portableapps format but then stating that a true portable app shouldn't write to the appdata folder, Surprise! Apps made portable by PortableApps.com still often write stuff to the appdata folder, sometimes even bypassing an app's own native portable mode, still writing stuff to the appdata folder even if an app's own portable mode already writes to its own portable data location just to make it adhere to their notion of a portableapps folder structure.
qBitTorrentPortable is a prime example of this.