Every time that I start Pharo 7.0.1 32-bit image (it's name is "Pharo 7.0 - 32bit" and it resides in the directory of the same name), a new directory is created under images directory, with the name "Pharo 7.0 - 64bit (development version)-01". Within it, Pharo is using directories "ombu-sessions", "play-cache" to store its run-time information. I'm using PharoLauncher version: 1.5.1. The situation is the same if I do this with a fresh 7.0.1 image. System reporter shows: Image ----- C:\Users\eftomi.MISKOTI\EFTOMI\PHARO\images\Pharo 7.0 - 32bit\Pharo 7.0 - 32bit.image Pharo7.0.1 Build information: Pharo-7.0.1+build.143.sha.eca26da119bccd95e463c7717a44b814453df4e8 (32 Bit) Unnamed Virtual Machine --------------- C:\Users\eftomi.MISKOTI\EFTOMI\PHARO\vms\70-x86\Pharo.exe CoInterpreter VMMaker.oscog-eem.2504 uuid: a00b0fad-c04c-47a6-8a11-5dbff110ac11 Jan 5 2019 StackToRegisterMappingCogit VMMaker.oscog-eem.2504 uuid: a00b0fad-c04c-47a6-8a11-5dbff110ac11 Jan 5 2019 VM: 201901051900 https://github.com/OpenSmalltalk/opensmalltalk-vm.git Date: Sat Jan 5 20:00:11 2019 CommitHash: 7a3c6b6 Plugins: 201901051900 https://github.com/OpenSmalltalk/opensmalltalk-vm.git Win32 built on Jan 5 2019 20:12:30 GMT Compiler: 7.4.0 VMMaker versionString VM: 201901051900 https://github.com/OpenSmalltalk/opensmalltalk-vm.git Date: Sat Jan 5 20:00:11 2019 CommitHash: 7a3c6b6 Plugins: 201901051900 https://github.com/OpenSmalltalk/opensmalltalk-vm.git CoInterpreter VMMaker.oscog-eem.2504 uuid: a00b0fad-c04c-47a6-8a11-5dbff110ac11 Jan 5 2019 StackToRegisterMappingCogit VMMaker.oscog-eem.2504 uuid: a00b0fad-c04c-47a6-8a11-5dbff110ac11 Jan 5 2019 -- Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html