1.8.0 should build for Windows 10 Store. If you run into problems please submit a bug report.
1.8.0 does not allow you to edit global variable names yet, but it is planned for in the 1.8.x cycle.
1.8.0 now has built in support for arrays. However Array Maker has been around longer, so it might have some functionality still missing in 1.8.0. Jean Fabre (maker of Array Maker) can probably elaborate more...