Mods no longer working after upgrading

[lovs2build]

I would like to upgrade to latest version. However all my tweaks mods and changes I made do not work after upgrading. Is there a trick or are mods like (youtube) and changes (colors, sizes etc.) not able to change? Is there something I am missing? Any help would be great. Thanks!
P.S. I love this app donating was the best investment I have ever done. When I had a problem with my License key Sid was on the ball and help me out.