I accidentally installed the 32 bit exe on windows 7 64 bit which did however work but advised me to install the 64 bit version as soon as it opened. I proceeded to install that one instead but then got this error and the program won’t open.
Seems like a general problem too me, about running 64 bit Java applications, maybe you just need to install Java using a 64 bit installation https://www.java.com/en/ and do a restart ofc, as you always should as a first troubleshooting effort.
You probably need to remove the application files (not the application data directory where the wallet and data base is in!)
Agree, maybe just un-installing / deleting the whole thing, restarting the computer and installing a 64 bit version from fresh will do the trick.