With the fourth nightly from june 06, #109 (avidemux_r200606_win64Qt5_109.zip), at start an error message box appears. stating (roughly translated):
avidemux.exe - entry point not found
The procedural entry point "DllMain" was not found in the DLL
"<<<pathname>>>\plugins\videoFilters}libADM_vf_ssa.dll"
Yes, thanks, this is known, the build environment is broken ATM. Please stay at the ZIP-packaged build No. 104 (edit: 105 is also OK and brings updated translations) for now. Sorry for inconvenience.