Based on your request, I found a few different versions of NxFilter that are available for download:

1. NxFilter 4.6.8.1: Unfortunately, this is the latest version, and it may not be compatible with older devices or operating systems.

2. NxFilter 4.6.6.3: This is an older version that should work on most devices, and it's available for download from Uptodown.

3. NxFilter 4.6.7.7: Another older version that may be suitable for your needs.

4. NxFilter 4.6.2.5: An even older version, which may be compatible with very old devices or operating systems.

If you're experiencing issues with the latest version, I recommend trying one of these older versions to see if they resolve the problem.

Here are some specific download links and instructions:

* NxFilter 4.6.6.3: 'Download from Uptodown'(https://uptodown.com/nxfilter/download/4.6.6.3)

* NxFilter 4.6.7.7: Not available for direct download, but you can try searching for it on other software websites.

* NxFilter 4.6.2.5: Not available for direct download, but you can try searching for it on other software websites.

If none of these older versions work for you, I suggest checking the official NxFilter website or contacting their support team to see if they have any additional recommendations or solutions.

Please let me know if there's anything else I can help with!

Download the new NxFilter 4.6.8.1