I closed my wallet and now it no longer opens even after I reinstalled it.
new version 7.4.4 I see the process in the task manager but no window.
Try opening the wallet again and then refresh your desktop multiple times. It does the trick in my wallet.
The wallet is also shown to be running but the wallet is not popping up but when I tried refreshing it finally showed. I'm not sure if this will work in your case tho.