Hey, prmiszkiewicz,
Are you running 32-bit or 64-bit JMP? If JMP is 32-bit, you need the x86 version of the JRE. If JMP is 64-bit, you need the x64 version of the JRE.
With early JRE 7 installs, we saw a number of instances of this JRE corruption you are seeing. To confirm your JRE is corrupt, you can go to a command prompt and type:
java -version
If your JRE is corrupt, you will not get a valid response.
I would suggest uninstalling the JRE you have and then installing the *latest* update of JRE 7, which looks like 7u71. We have not seen the JRE corruption with later updates of JRE 7, plus there are many important Java security updates that have taken place since Java 7u15.
Please let us know how it goes.
Thanks,
Eric