Thank you Rainer. They should come clear instead of avoiding giving a strait answer, nothing wrong with your assumption.
Beside that....
After removing Fluidstack via "Apps and Features" uninstall
I did a registry scan.
54 hits, including leaving your firewall open.
I'am not sure if using the "uninstall" from C:\Program Files\FluidStack\Uninstall.exe make a difference, maybe someone else can tell?
It might just be bad coding, or it might be for a reason, i can't tell.
HKCR\\Local Settings\\Software\\Microsoft\\Windows\\CurrentVersion\\AppContainer\\Storage\\microsoft.microsoftedge\_8wekyb3d8bbwe\\Children\\001\\Internet Explorer\\DOMStorage\\[
fluidstack.io](
https://fluidstack.io) REG\_DWORD 0x00000000 (0) 16/06/2019 22.26.14 4
HKCR\\Local Settings\\Software\\Microsoft\\Windows\\CurrentVersion\\AppContainer\\Storage\\microsoft.microsoftedge\_8wekyb3d8bbwe\\Children\\001\\Internet Explorer\\DOMStorage\\[
fluidstack.io](
https://fluidstack.io) NumberOfSubdomains REG\_DWORD 0x00000001 (1) 16/06/2019 22.26.14 4
HKCR\\Local Settings\\Software\\Microsoft\\Windows\\CurrentVersion\\AppContainer\\Storage\\microsoft.microsoftedge\_8wekyb3d8bbwe\\Children\\001\\Internet Explorer\\DOMStorage\\[
fluidstack.io](
https://fluidstack.io) Total REG\_DWORD 0x000002d2 (722) 16/06/2019 22.26.14 4
HKCR\\Local Settings\\Software\\Microsoft\\Windows\\CurrentVersion\\AppContainer\\Storage\\microsoft.microsoftedge\_8wekyb3d8bbwe\\Children\\001\\Internet Explorer\\DOMStorage\\[
provider.fluidstack.io](
https://provider.fluidstack.io) REG\_DWORD 0x000002d2 (722) 16/06/2019 22.26.14 4
HKCR\\Local Settings\\Software\\Microsoft\\Windows\\CurrentVersion\\AppContainer\\Storage\\microsoft.microsoftedge\_8wekyb3d8bbwe\\Children\\001\\Internet Explorer\\EdpDomStorage\\[
fluidstack.io](
https://fluidstack.io) REG\_DWORD 0x00000000 (0) 06/06/2019 23.09.47 4
HKCR\\Local Settings\\Software\\Microsoft\\Windows\\CurrentVersion\\AppContainer\\Storage\\microsoft.microsoftedge\_8wekyb3d8bbwe\\Children\\001\\Internet Explorer\\EdpDomStorage\\[
fluidstack.io](
https://fluidstack.io) NumberOfSubdomains REG\_DWORD 0x00000000 (0) 06/06/2019 23.09.47 4
HKCR\\Local Settings\\Software\\Microsoft\\Windows\\CurrentVersion\\AppContainer\\Storage\\microsoft.microsoftedge\_8wekyb3d8bbwe\\Children\\001\\Internet Explorer\\EdpDomStorage\\[
fluidstack.io](
https://fluidstack.io) Total REG\_DWORD 0x00000000 (0) 06/06/2019 23.09.47 4
HKCR\\Local Settings\\Software\\Microsoft\\Windows\\CurrentVersion\\AppContainer\\Storage\\microsoft.microsoftedge\_8wekyb3d8bbwe\\Children\\001\\Internet Explorer\\EdpDomStorage\\[
provider.fluidstack.io](
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fluidstack.io](
https://fluidstack.io) REG\_DWORD 0x00000000 (0) 16/06/2019 22.26.14 4
HKCU\\Software\\Classes\\Local Settings\\Software\\Microsoft\\Windows\\CurrentVersion\\AppContainer\\Storage\\microsoft.microsoftedge\_8wekyb3d8bbwe\\Children\\001\\Internet Explorer\\DOMStorage\\[
fluidstack.io](
https://fluidstack.io) NumberOfSubdomains REG\_DWORD 0x00000001 (1) 16/06/2019 22.26.14 4
HKCU\\Software\\Classes\\Local Settings\\Software\\Microsoft\\Windows\\CurrentVersion\\AppContainer\\Storage\\microsoft.microsoftedge\_8wekyb3d8bbwe\\Children\\001\\Internet Explorer\\DOMStorage\\[
fluidstack.io](
https://fluidstack.io) Total REG\_DWORD 0x000002d2 (722) 16/06/2019 22.26.14 4
HKCU\\Software\\Classes\\Local Settings\\Software\\Microsoft\\Windows\\CurrentVersion\\AppContainer\\Storage\\microsoft.microsoftedge\_8wekyb3d8bbwe\\Children\\001\\Internet Explorer\\DOMStorage\\[
provider.fluidstack.io](
https://provider.fluidstack.io) REG\_DWORD 0x000002d2 (722) 16/06/2019 22.26.14 4
HKCU\\Software\\Classes\\Local Settings\\Software\\Microsoft\\Windows\\CurrentVersion\\AppContainer\\Storage\\microsoft.microsoftedge\_8wekyb3d8bbwe\\Children\\001\\Internet Explorer\\EdpDomStorage\\[
fluidstack.io](
https://fluidstack.io) REG\_DWORD 0x00000000 (0) 06/06/2019 23.09.47 4
HKCU\\Software\\Classes\\Local Settings\\Software\\Microsoft\\Windows\\CurrentVersion\\AppContainer\\Storage\\microsoft.microsoftedge\_8wekyb3d8bbwe\\Children\\001\\Internet Explorer\\EdpDomStorage\\[
fluidstack.io](
https://fluidstack.io) NumberOfSubdomains REG\_DWORD 0x00000000 (0) 06/06/2019 23.09.47 4
HKCU\\Software\\Classes\\Local Settings\\Software\\Microsoft\\Windows\\CurrentVersion\\AppContainer\\Storage\\microsoft.microsoftedge\_8wekyb3d8bbwe\\Children\\001\\Internet Explorer\\EdpDomStorage\\[
fluidstack.io](
https://fluidstack.io) Total REG\_DWORD 0x00000000 (0) 06/06/2019 23.09.47 4
HKCU\\Software\\Classes\\Local Settings\\Software\\Microsoft\\Windows\\CurrentVersion\\AppContainer\\Storage\\microsoft.microsoftedge\_8wekyb3d8bbwe\\Children\\001\\Internet Explorer\\EdpDomStorage\\[
provider.fluidstack.io](
https://provider.fluidstack.io) REG\_DWORD 0x00000000 (0) 06/06/2019 23.09.47 4
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HKLM\\SYSTEM\\ControlSet001\\Services\\SharedAccess\\Parameters\\FirewallPolicy\\FirewallRules {44EF1C42-625C-4438-BA95-6469B005642C} REG\_SZ v2.29|Action=Allow|Active=TRUE|Dir=In|Protocol=6|LPort=65124|Name=FluidStackNode-tcp-65124| 18/06/2019 07.41.22 92
HKLM\\SYSTEM\\ControlSet001\\Services\\SharedAccess\\Parameters\\FirewallPolicy\\FirewallRules {DEAD4516-B4BE-47B9-92DE-AB0F71FB902F} REG\_SZ v2.29|Action=Allow|Active=TRUE|Dir=In|Protocol=6|LPort=65123|Name=FluidStackNode-tcp-65123| 18/06/2019 07.41.22 92
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Some Binary numbers removed because of character limit