Hell and welcome to the WeMod community. 
Sorry to hear that you’re having an issue re-downloading WeMod.
Around 98% of the time this issue occurs, it is always because of interference from antivirus programs.
Please give the troubleshooting in this post a whirl: Can’t Install WeMod.
If that doesn’t seem to resolve the issue for you, please share the log either in a .txt file format by clicking the “upload” button on the toolbar when you reply to the thread. Or paste the log into PasteBin (https://pastebin.com/) and share the link in a reply.
Thank you.