Not sure if this is a universal solution, but here's what worked for me on two separate machines running Windows 7 Home Premium (64) and Windows 7 Enterprise (64).
Groovy 2.2.1 Groovy 2.3.4
Groovy , Program Files. groovyclient groovyserver , .
-, Groovy , Program Files. , . , - , groovyclient, (C:\Groovy\Test groovy with spaces\Groovy-2.2.1 ). , - .
- , , . , , , .