Hi, bought recently Tape Echo and found bug it seems. It's related with backround noise level.
Simple reproduce: load plugin - we no hear noise. Load first factory preset "GTR Echo" - as well no noise. Then load last factory preset "Whacked..etc" - we hear noise. Then load again first preset - now noise here. Open tweak panel - we see that noise handle stay at zero. Touch it by mouse - noise will abruptly stopped, accordingly to value level.
Plugin version 5.1.1 (vst win10 64bit)