The 64bit version (2.20.9.1273) of TomTom HOME is out - but WON'T start

Went through the rigmarole of updating TOMTOM HOME but when trying to open it, it bounces once in the dock and stops. Tried all sorts but cannot get it to work. Running the unix executable gives the following error message:

MacBook-Pro:~ ikky$ /Applications/TomTomHOME.app/Contents/MacOS/startup ; exit;
Exception in thread "main" java.lang.UnsupportedClassVersionError: com/tomtom/hc/controller/main/H2CApplication : Unsupported major.minor version 52.0
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClassCond(ClassLoader.java:637)
at java.lang.ClassLoader.defineClass(ClassLoader.java:621)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:283)
at java.net.URLClassLoader.access$000(URLClassLoader.java:58)
at java.net.URLClassLoader$1.run(URLClassLoader.java:197)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
logout
Saving session...
...copying shared history...
...saving history...truncating history files...
...completed.

[Process completed]

MacOS Mojave 10.14.6 (I've held off updating to Catalina until TomTom HOME is updated)

Anyone got any ideas?