Windows Live Mail

I have two Windows 10 computers.  Both have a Yahoo/AT&T email account but I use Windows Live Mail with same email/password info because I'm familiar with WLM and it's speed.  After recent W10 updates I cannot open WLM on computer #2 by clicking on the shortcut or the WLM icon on the desk top on one of the computers.  WLM works as it should on computer #1.  As far as I can tell the settings for WLM are the same for both computers.  On computer #2 I clicked on Ctrl/Shift/Esc and WLM appears on the monitor and new emails appear.   As soon as I close WLM on computer #2 I'm back to the problem...WLM will not open.  How to fix?