diff --git a/build.sbt b/build.sbt
index 052efa7d2ef..b78dded33dd 100755
--- a/build.sbt
+++ b/build.sbt
@@ -6,7 +6,7 @@ enablePlugins(sbtdocker.DockerPlugin, JavaServerAppPackaging, JDebPackaging, Sys
 
 name := "waves"
 organization := "com.wavesplatform"
-version := "0.7.5"
+version := "0.7.7-SNAPSHOT"
 scalaVersion in ThisBuild := "2.12.3"
 crossPaths := false
 publishArtifact in (Compile, packageDoc) := false
diff --git a/src/package/debian/postrm b/src/package/debian/postrm
index 033a2b30203..48775f45ea4 100644
--- a/src/package/debian/postrm
+++ b/src/package/debian/postrm
@@ -6,7 +6,6 @@ if [ "$1" = purge ]; then
     rm -rf /var/lib/${{app_name}}/snapshots
     rm -rf /var/lib/${{app_name}}/data
     rm -rf /etc/${{app_name}}/application.ini
-    rm -rf /etc/${{app_name}}.conf
     rm -rf /var/log/${{app_name}}
 
     if is_upstart; then
diff --git a/src/package/debian/preinst b/src/package/debian/preinst
index 293979f5c24..79b5950592a 100644
--- a/src/package/debian/preinst
+++ b/src/package/debian/preinst
@@ -2,35 +2,31 @@ ${{header}}
 ${{loader-functions}}
 
 if [ "$1" = upgrade ]; then
-    # change home directory and remove legacy data files
-    previous_home=$(getent passwd ${{app_name}} | cut -d: -f6)
-    if [ "$previous_home" = /home/${{app_name}} ]; then
-        usermod --home /var/lib/${{app_name}} ${{app_name}}
-    fi
-    rm -f /home/${{app_name}}/waves/data/blockchain.dat
-    rm -f /home/${{app_name}}/waves/data/peers.dat
-
-    # delete legacy configuration files
-    for file_to_remove in application.conf application-dev.conf logback-to-file.xml logback.xml reference.conf logback-overrides.xml
-    do
-        rm -f /usr/share/${{app_name}}/conf/$file_to_remove
-    done
-
-    rm -fr /usr/share/${{app_name}}/conf/target
     rm -f /etc/init/${{app_name}}.conf
 
-    chmod -s -x /usr/share/${{app_name}}/conf/* || true
-
-    mkdir -p /var/lib/${{app_name}}
-    # move wallet file to a new default location
-    if [ -f /home/${{app_name}}/waves/wallet/wallet.s.dat ]; then
-        echo Moving wallet file to a new default location ...
-        mkdir -p /var/lib/${{app_name}}/wallet/
-        mv /home/${{app_name}}/waves/wallet/wallet.s.dat /var/lib/${{app_name}}/wallet/wallet.dat
-    fi
-
     case "$2" in
         0.6*)
+            # change home directory and remove legacy data files
+            rm -f /home/${{app_name}}/waves/data/blockchain.dat
+            rm -f /home/${{app_name}}/waves/data/peers.dat
+
+            # delete legacy configuration files
+            for file_to_remove in application.conf application-dev.conf logback-to-file.xml logback.xml reference.conf logback-overrides.xml
+            do
+                rm -f /usr/share/${{app_name}}/conf/$file_to_remove
+            done
+
+            rm -fr /usr/share/${{app_name}}/conf/target
+
+            chmod -s -x /usr/share/${{app_name}}/conf/* || true
+
+            # move wallet file to a new default location
+            if [ -f /home/${{app_name}}/waves/wallet/wallet.s.dat ]; then
+                echo Moving wallet file to a new default location ...
+                mkdir -p /var/lib/${{app_name}}/wallet/
+                mv /home/${{app_name}}/waves/wallet/wallet.s.dat /var/lib/${{app_name}}/wallet/wallet.dat
+            fi
+
             if [ -f /etc/${{app_name}}.conf ]; then
                 echo Moving node configuration file from /etc/${{app_name}}.conf to /etc/${{app_name}}/waves.conf ...
                 mv /etc/${{app_name}}.conf /etc/${{app_name}}/waves.conf || true
@@ -46,14 +42,14 @@ if [ "$1" = upgrade ]; then
                 mv /home/${{app_name}}/waves/journal /var/lib/${{app_name}}/journal || true
                 mv /home/${{app_name}}/waves/snapshots /var/lib/${{app_name}}/snapshots || true
             fi
-            ;;
-        *)
+
             if [ -f /etc/${{app_name}}.json ]; then
                 echo Moving legacy configuration file to a new location ...
                 cp /etc/${{app_name}}.json /etc/${{app_name}}/waves.json
                 chmod -x /etc/${{app_name}}/waves.json
             fi
-
+            ;;
+        *)
             rm -f /etc/${{app_name}}.json
             rm -f /usr/share/${{app_name}}/settings.json
             ;;
diff --git a/waves-mainnet.conf b/waves-mainnet.conf
index 5b7b8aad421..73edf13f747 100644
--- a/waves-mainnet.conf
+++ b/waves-mainnet.conf
@@ -14,11 +14,10 @@ waves {
     port = 6868
 
     # Node name to send during handshake. Comment this string out to set random node name.
-    #node-name = "My MAINNET node"
+    # node-name = "My MAINNET node"
 
     # String with IP address and port to send as external address during handshake. Could be set automatically if uPnP is enabled.
     # declared-address = "1.2.3.4:6868"
-
   }
 
   # Wallet settings