When you download QSLs from the LOTW site, you need to enter the date from which QSLs will be downloaded. In order to minimize the amount of data downloaded, this date should update automatically when you download. But now you have to remember when you last downloaded, or leave the date unchanged and download a larger file than necessary.
I could probably fix this myself, but I haven't been able to find the module that does the "download QSLs from LOTW website" function. Can someone tell me which it is?