I download the new Version of TsiLang 5.25fix1. Frist I removed the old Version 5.20 and after that I installed 5.25fix1, but I get no Menu-Item and no Icons in my IDE (delphi 7).
It looks like you didn't re-compiled and installed the TsiLang package. Just open TsiLang_D7.dpk file into Delphi 7 and click Install button. The registered version sources should be manually installed into IDE.
P.S. Be sure to delete also all old DCUs from your drive also before this.