[x64] Not work "Allow 1 copy of TC at a time"

[gora]

Are installed TC 7.56a, 8b6 x86, 8b6 x64.
At all it is marked checkbox "Allow 1 copy of TC at a time"
At start of any of x86 TC the second copy isn't launched neither the version with the same name, nor other versions and digit capacity.
At start by the first x64 TC, x64 it is not possible to launch the second copy, but here any of x86 versions is launched and in title has a mark [2]. It was not possible to launch the third copy.
It like even is convenient for a testing stage, however checkbox that doesn't work as should.

Win7 x64

[ghisler(Author)]

This function only works well within the same group, e.g. when launching only 32-bit version or only the 64-bit version. The problem is that the method to re-activate a previous version used by the 32-bit version cannot work with Lazarus.