Hi, just yesterday WeMod was working just fine, however with this new update WeMod is not opening anymore. Also, when I try to download WeMod again, it said installation failed. I am use windows 7
Hello and welcome to the community. 
Windows 7 is no longer supported by Microsoft - they have completely abandoned it since 14th January 2020. And it is therefore also no longer supported by software developers, as it is massively outdated and no longer compatible with the more advanced modern technology we use today.
- Windows 7 could be upgraded to Windows 10 (which is still supported) for free up until the 29th July, 2016.
- If you were using Windows 10 right now, you would have also been able to upgrade to Windows 11 for free - an offer that is still available.
- You cannot upgrade from Windows 7 to Windows 11 for free. I doubt the hardware of a Windows 7 device can even handle that jump of an upgrade, to be honest (ie, much less storage space).
One suggestion you can try is to make sure you have .NET Framework 4.7 installed on your machine at the very minimum, though 4.8 is the recommended version. Official links:
Hi, thanks for the reply. WeMod was working just fine yesterday, I think the new update (9.0) cause some issues. I do have .NET Framework 4.8 installed on my computer. The problem that I have is that WeMod for some reason will not install any more on my computer.