Fixing listchecker after 1.22 patch
There is one file you should download and save it into your listchecker directory. The file name is pickup.listchecker.exe.
After you click on the link select "Save" and set the location to your listchecker directory. Click 'yes' to overwrite previous listchecker version.
There are also 2 other files posted on listchecker official site but you'll need only file named pickup.listchecker.exe. If you download the other two you'll need to set-up configuration of your listchecker again.