I have not had problems downloading now.
I tell you my tests, they have been executing it for the first time it seemed that I was not doing anything. I executed it again, and a first window appeared, a second, I do not recieve if third and it closed. With seamonkey-2.42.9esr.en-US.os2_exp1
What I have observed is that if I want to run firefox45.9, first I have to run firefox45.5 and close it. Then I can open firefox45.9 without problems. In fact, after I closed firefox45.9, I was able to execute it from a folder that was not in libpath. Although it may be that even if it has booted from a folder that is not in the libpath, it may have loaded the xul.dll that is in libptah. I do not.
The seamonkey generate a trp file if you need.
saludos