Thanks for opening the ticket. I looked at it when it was reported in the forum, But had no test build at hand to test a fix. If you look at the history of g4wihelp.c you can see how other functions have been ported to Unicode recently. The change is that the strings in the nsis script world have changed to two byte strings. The problem is then where the c code interacts with the NSIS script obtaining parameters and setting return values. Since the popstackna takes an ascii string it only takes the first character as the second byte is null. Changing these occurrences to popstackn and the setuservariable to widechar should do the trick.