I just discovered that Irfan released a revised (updated) collection of plugins for IrfanView. The following is a list of files contained in "all_plugins.zip" dd. May 27, 2001. It is sorted by date and - self-evident - created with ZTree's feature "Print Catalog of Tagged Files" ;-). Comparing this list with the files on your hard disk will help you to decide whether it is worthwhile for you to download the complete archive "all_plugins.zip" which has a size of 2,210,785 bytes.
My favorite source for "all_plugins.zip" is always
http://stud1.tuwien.ac.at/~e9227474/plugins/
but it should be available also from the other well-known places.
Here is the file list:
5-03-1996 0:26:14 49.152 .a.. afhbevel.8bf
26-02-1997 17:21:22 57.344 .a.. 3DMaker .8bf
10-06-1998 16:44:36 166.400 .a.. KDC120 .dll
7-11-1998 20:17:52 57.344 .a.. AcouCop .8bf
31-03-2000 21:01:14 81.408 .a.. Photocd .dll
21-04-2000 16:56:06 394.752 .a.. Fpx .dll
9-07-2000 18:10:48 111.616 .a.. FUNLTDIV.dll
9-07-2000 22:55:04 1.965 .a.. FUnlimited_Readme.txt
9-07-2000 22:55:28 2.322 .a.. FUnlimited_Liesmich.txt
21-01-2001 23:13:54 555 .a.. Readme .txt
25-03-2001 14:49:34 151.040 .a.. IV_Player.exe
12-04-2001 22:16:24 34.304 .a.. Sff .dll
12-04-2001 22:17:58 36.352 .a.. Quicktime.dll
12-04-2001 22:18:36 43.008 .a.. Ncc .dll
12-04-2001 22:24:00 69.632 .a.. FFactory.dll
12-04-2001 22:25:00 92.672 .a.. DjVu .dll
19-04-2001 15:22:32 27.648 .a.. Video .dll
19-04-2001 16:44:44 101.376 .a.. Formats .dll
19-04-2001 16:56:28 6.344 .a.. Plugins .txt
19-04-2001 17:41:46 44.544 .a.. Exif .dll
23-04-2001 10:26:10 69.120 .a.. Jpg_transform.dll
9-05-2001 23:39:28 119.296 .a.. Email .dll
27-05-2001 14:38:04 45.056 .a.. Ra_player.dll
27-05-2001 15:00:22 219.648 .a.. Mp3 .dll
27-05-2001 15:03:16 151.552 .a.. Med .dll
27-05-2001 15:28:36 424.960 .a.. Flash .dll
27-05-2001 15:32:20 73.728 .a.. Lwf .dll
27-05-2001 15:33:46 228.864 .a.. Ldf .dll
\ Charles
PS: A new version of IrfanView itself is obviously not (yet) released.