Hi Roger
We have created a group here on Li360 called MapInfo Pro v17 Transition Team, https://li360.pitneybowes.com/s/group/0F980000000Tcj3CAC/mapinfo-pro-v17-transition-team.
Here we help people looking to cross over to the 64 bit World from the 32 bit World. This also included giving you a hand to get smallish applications working in MapInfo Pro 17.0.
Maybe post one of your tools there, if possible, and we can give you some hints to porting it to 64 bit.
I would also like to mention that we have made some great improvements to the Create/Alter Buttonpad statement which means you can use these statements for adding basic buttons (Push, Toogle and ToolButtons) to the ribbon interface. In a lot of cases this will help bring MapBasic applications across too. This will be available with the 17.0.1 patch around August.