Since 2 releases of AVIdemux, when I run the program a requester says (translated from french):
The procedure entry point _ZN11diaElemFileC1EjPPcPKCS3_S3_ cannot be found in the dynamic link lybrary libADM_coreUI6.dll
When I acknowledge the requester, AVIdemux starts fine.
Do a clean install
You probably have some old files from a previous installation