diff --git a/lib/jt9.f90 b/lib/jt9.f90
index ff5307ef4..2265f7576 100644
--- a/lib/jt9.f90
+++ b/lib/jt9.f90
@@ -7,7 +7,7 @@ program jt9
   integer*4 ihdr(11)
   real*4 s(NSMAX)
   integer*2 id2
-  character*80 arg,infile
+  character*80 arg,ldir,infile
   common/jt9com/ss(184,NSMAX),savg(NSMAX),id2(NMAX),nutc,ndiskdat,ntr,       &
        mousefqso,newdat,nfa,nfsplit,nfb,ntol,kin,nzhsym,nsynced,ndecoded
   common/tracer/limtrace,lu
@@ -25,7 +25,8 @@ program jt9
   if(arg(1:2).eq.'-s') then
 ! Multiple instances:
      call getarg(2,arg)
-     call jt9a(trim(arg))
+     call getarg(3,ldir)
+     call jt9a(trim(arg),trim(ldir))
      go to 999
   endif
   read(arg,*) ntrperiod
diff --git a/lib/jt9a.f90 b/lib/jt9a.f90
index 113533c7e..34f1a46ff 100644
--- a/lib/jt9a.f90
+++ b/lib/jt9a.f90
@@ -1,6 +1,7 @@
-subroutine jt9a(thekey)
+subroutine jt9a(thekey,ldir)
 
   character(len=*), intent(in):: thekey
+  character(len=*), intent(in):: ldir
 
 ! These routines connect the shared memory region to the decoder.
   interface
@@ -36,13 +37,13 @@ subroutine jt9a(thekey)
 
   i1=attach_jt9()
 
-10 inquire(file=trim(cwd)//'/.lock',exist=fileExists)
+10 inquire(file=trim(ldir)//'/.lock',exist=fileExists)
   if(fileExists) then
      call sleep_msec(100)
      go to 10
   endif
 
-  inquire(file=trim(cwd)//'/.quit',exist=fileExists)
+  inquire(file=trim(ldir)//'/.quit',exist=fileExists)
   if(fileExists) then
 !     call ftnquit
      i1=detach_jt9()
@@ -61,7 +62,7 @@ subroutine jt9a(thekey)
   call jt9b(p_jt9,nbytes)
   call timer('jt9b    ',1)
 
-100 inquire(file=trim(cwd)//'/.lock',exist=fileExists)
+100 inquire(file=trim(ldir)//'/.lock',exist=fileExists)
   if(fileExists) go to 10
   call sleep_msec(100)
   go to 100
diff --git a/mainwindow.cpp b/mainwindow.cpp
index 1fbb8b381..524431a34 100644
--- a/mainwindow.cpp
+++ b/mainwindow.cpp
@@ -321,7 +321,10 @@ MainWindow::MainWindow(QSettings * settings, QSharedMemory *shdmem, QString *the
 // Multiple instances: start "jt9 -s <thekey>"
   QByteArray  ba = mykey_jt9->toLocal8Bit();
   const char *bc = ba.data();
-  proc_jt9.start(QDir::toNativeSeparators('"' + m_appDir + '"' + "/jt9 -s " + bc));
+//  proc_jt9.start(QDir::toNativeSeparators('"' + m_appDir + '"' + "/jt9 -s " + bc));
+  QByteArray lda = m_appDir.toLocal8Bit();
+  const char *ldir = lda.data();
+  proc_jt9.start(QDir::toNativeSeparators('"' + m_appDir + '"' + "/jt9 -s " + bc + " " + ldir));
 
   m_pbdecoding_style1="QPushButton{background-color: cyan; \
       border-style: outset; border-width: 1px; border-radius: 5px; \